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  <xs:element id="grnt_A2024DivestituresMember" abstract="true" name="A2024DivestituresMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_VitalEnergyIncMember" abstract="true" name="VitalEnergyIncMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_NoncashOrPartNoncashDivestitureConsiderationReceivedShares" abstract="false" name="NoncashOrPartNoncashDivestitureConsiderationReceivedShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="grnt_NoncashOrPartNoncashDivestitureCommonStockShares" abstract="false" name="NoncashOrPartNoncashDivestitureCommonStockShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="grnt_PermianBasinTexasMember" abstract="true" name="PermianBasinTexasMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="grnt_EagleFordBasinTexasMember" abstract="true" name="EagleFordBasinTexasMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="grnt_BakkenBasinMontanaNorthMontanaNorthDakotaMember" abstract="true" name="BakkenBasinMontanaNorthMontanaNorthDakotaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="grnt_HaynesvilleMember" abstract="true" name="HaynesvilleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="grnt_DenverJulesburgDjColoradoMember" abstract="true" name="DenverJulesburgDjColoradoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="grnt_ScoopStackMember" abstract="true" name="ScoopStackMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="grnt_AppalachianMember" abstract="true" name="AppalachianMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_NumberOfRevenueSources" abstract="false" name="NumberOfRevenueSources" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="grnt_OperatingRegions" abstract="false" name="OperatingRegions" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="grnt_AdValoremTaxExpense" abstract="false" name="AdValoremTaxExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="grnt_CollarNaturalGasContract2025TotalMember" abstract="true" name="CollarNaturalGasContract2025TotalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="grnt_SwapsNaturalGasContract2025TotalMember" abstract="true" name="SwapsNaturalGasContract2025TotalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="grnt_WeightedAverageFloorPriceMember" abstract="true" name="WeightedAverageFloorPriceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="grnt_WeightedAveragePriceMember" abstract="true" name="WeightedAveragePriceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
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  <xs:element id="grnt_ThirdQuarterMember" abstract="true" name="ThirdQuarterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="grnt_FourthQuarterMember" abstract="true" name="FourthQuarterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="grnt_A2024Member" abstract="true" name="A2024Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_A2025Member" abstract="true" name="A2025Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_PeriodAfterBusinessCombinationCloseInWhichWarrantsBecomeExercisable" abstract="false" name="PeriodAfterBusinessCombinationCloseInWhichWarrantsBecomeExercisable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="grnt_ClassOfWarrantOrRightWarrantsExercised" abstract="false" name="ClassOfWarrantOrRightWarrantsExercised" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="grnt_BakkenMember" abstract="true" name="BakkenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_OilCommodityPricesPerBarrel2025Member" abstract="true" name="OilCommodityPricesPerBarrel2025Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_OilCommodityPricesPerBarrel2029Member" abstract="true" name="OilCommodityPricesPerBarrel2029Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_NaturalGasCommodityPricesPerMcf2025Member" abstract="true" name="NaturalGasCommodityPricesPerMcf2025Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_NaturalGasCommodityPricesPerMcf2029Member" abstract="true" name="NaturalGasCommodityPricesPerMcf2029Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_OilCommodityPricesPerBarrel2024Member" abstract="true" name="OilCommodityPricesPerBarrel2024Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_OilCommodityPricesPerBarrel2028Member" abstract="true" name="OilCommodityPricesPerBarrel2028Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_NaturalGasCommodityPricesPerMcf2024Member" abstract="true" name="NaturalGasCommodityPricesPerMcf2024Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_NaturalGasCommodityPricesPerMcf2028Member" abstract="true" name="NaturalGasCommodityPricesPerMcf2028Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="grnt_DerivativeAssetNonCurrentSubjectToMasterNettingArrangementAfterOffsetAndDeduction" abstract="false" name="DerivativeAssetNonCurrentSubjectToMasterNettingArrangementAfterOffsetAndDeduction" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="grnt_DerivativeLiabilitySubjectToMasterNettingArrangementCurrentAssetOffset" abstract="false" name="DerivativeLiabilitySubjectToMasterNettingArrangementCurrentAssetOffset" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="grnt_DerivativeLiabilitySubjectToMasterNettingArrangementNonCurrentAssetOffset" abstract="false" name="DerivativeLiabilitySubjectToMasterNettingArrangementNonCurrentAssetOffset" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="grnt_DerivativeLiabilityNonCurrentSubjectToMasterNettingArrangementAfterOffset" abstract="false" name="DerivativeLiabilityNonCurrentSubjectToMasterNettingArrangementAfterOffset" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="grnt_AppalachiaMember" abstract="true" name="AppalachiaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="grnt_HaynesvilleBasinMember" abstract="true" name="HaynesvilleBasinMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_UnprovedOilAndNaturalGasPropertiesMember" abstract="true" name="UnprovedOilAndNaturalGasPropertiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_ProvedOilAndNaturalGasPropertiesMember" abstract="true" name="ProvedOilAndNaturalGasPropertiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_ProvedAndUnprovedOilAndNaturalGasPropertiesMember" abstract="true" name="ProvedAndUnprovedOilAndNaturalGasPropertiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_OilAndNaturalGasPropertyAcquisitions2023Member" abstract="true" name="OilAndNaturalGasPropertyAcquisitions2023Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="grnt_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetRetirementObligations" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetRetirementObligations" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="grnt_EffectiveIncomeTaxRateReconciliationCorporateAlternativeMinimumTaxPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationCorporateAlternativeMinimumTaxPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="grnt_EffectiveIncomeTaxRateReconciliationNondeductibleExciseTaxPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationNondeductibleExciseTaxPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="grnt_NetIncomeLossPriorToBusinessCombinationNonTaxable" abstract="false" name="NetIncomeLossPriorToBusinessCombinationNonTaxable" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="grnt_SecuredOvernightFinancingRateMember" abstract="true" name="SecuredOvernightFinancingRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_CreditSpreadAdjustmentAxis" abstract="true" name="CreditSpreadAdjustmentAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="grnt_CreditSpreadAdjustmentDomain" abstract="true" name="CreditSpreadAdjustmentDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="grnt_CreditSpreadAdjustmentScenarioOneMember" abstract="true" name="CreditSpreadAdjustmentScenarioOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="grnt_CreditSpreadAdjustmentScenarioTwoMember" abstract="true" name="CreditSpreadAdjustmentScenarioTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="grnt_CreditSpreadAdjustmentScenarioThreeMember" abstract="true" name="CreditSpreadAdjustmentScenarioThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="grnt_VariableInterestRateAdjustmentTerm" abstract="false" name="VariableInterestRateAdjustmentTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="grnt_AdditionalCreditSpreadAdjustmentAddedToVariableRate" abstract="false" name="AdditionalCreditSpreadAdjustmentAddedToVariableRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="grnt_DebtCovenantTotalDebtToEBITDAX" abstract="false" name="DebtCovenantTotalDebtToEBITDAX" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
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  <xs:element id="grnt_CommonStockRepurchaseProgramMember" abstract="true" name="CommonStockRepurchaseProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="grnt_ClassOfWarrantOrRightExchangeCosts" abstract="false" name="ClassOfWarrantOrRightExchangeCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="grnt_SharesToBeConvertedDuringMerger" abstract="false" name="SharesToBeConvertedDuringMerger" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
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  <xs:element id="grnt_ConvertedSharesSubjectToCertainVestingProvisions" abstract="false" name="ConvertedSharesSubjectToCertainVestingProvisions" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="grnt_GreyRockAdministrationLLCTheManagerMember" abstract="true" name="GreyRockAdministrationLLCTheManagerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_AffiliateOfGreyRockAdministrationLLCMember" abstract="true" name="AffiliateOfGreyRockAdministrationLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_OilAndGasManagementAgreementRenewalTerm" abstract="false" name="OilAndGasManagementAgreementRenewalTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="grnt_OilAndGasManagementAgreementTransitionServicesTerm" abstract="false" name="OilAndGasManagementAgreementTransitionServicesTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="grnt_RelatedPartyTransactionManagementServiceFees" abstract="false" name="RelatedPartyTransactionManagementServiceFees" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="grnt_ManagementFeesPaid" abstract="false" name="ManagementFeesPaid" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="grnt_OperatorBMember" abstract="true" name="OperatorBMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="grnt_OperatorCMember" abstract="true" name="OperatorCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="grnt_OperatorDMember" abstract="true" name="OperatorDMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="grnt_PercentageOfWellsOperatedByThirdPartyOperatingPartners" abstract="false" name="PercentageOfWellsOperatedByThirdPartyOperatingPartners" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="grnt_ConcentrationRiskSignificantOperatorPercentage" abstract="false" name="ConcentrationRiskSignificantOperatorPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="grnt_ConcentrationRiskDisclosureOfOperatorRevenuesPercentage" abstract="false" name="ConcentrationRiskDisclosureOfOperatorRevenuesPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="grnt_OmnibusIncentivePlanMember" abstract="true" name="OmnibusIncentivePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="grnt_EmployeeAndConsultantsMember" abstract="true" name="EmployeeAndConsultantsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_NonEmployeeDirectorsMember" abstract="true" name="NonEmployeeDirectorsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_ShareBasedCompensationArrangementBySharebasedPaymentAwardIssuedPercentage" abstract="false" name="ShareBasedCompensationArrangementBySharebasedPaymentAwardIssuedPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="grnt_NumberOfAnniversaries" abstract="false" name="NumberOfAnniversaries" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="grnt_OtherAwardsMember" abstract="true" name="OtherAwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_ShareBasedCompensationArrangementsByShareBasedPaymentAwardCompensationExpenseExpectedInNextTwelveMonths" abstract="false" name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardCompensationExpenseExpectedInNextTwelveMonths" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="grnt_ShareBasedCompensationArrangementsByShareBasedPaymentAwardCompensationExpenseExpectedInYearTwo" abstract="false" name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardCompensationExpenseExpectedInYearTwo" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="grnt_ShareBasedCompensationArrangementsByShareBasedPaymentAwardCompensationExpenseExpectedInYearThree" abstract="false" name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardCompensationExpenseExpectedInYearThree" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="grnt_ShareBasedCompensationArrangementsByShareBasedPaymentAwardCompensationExpenseExpectedInFuture" abstract="false" name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardCompensationExpenseExpectedInFuture" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="grnt_VestingSharesMember" abstract="true" name="VestingSharesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_AccruedDrillingCosts" abstract="false" name="AccruedDrillingCosts" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="grnt_AccruedProductionCosts" abstract="false" name="AccruedProductionCosts" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="grnt_PermianBasinMember" abstract="true" name="PermianBasinMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_CollarOilContract2025Member" abstract="true" name="CollarOilContract2025Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_CollarOilContract2026TotalMember" abstract="true" name="CollarOilContract2026TotalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_CollarNaturalGasContract2025Member" abstract="true" name="CollarNaturalGasContract2025Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_CollarNaturalGasContract2026TotalMember" abstract="true" name="CollarNaturalGasContract2026TotalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_SwapsNaturalGasContract2025Member" abstract="true" name="SwapsNaturalGasContract2025Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_SwapsNaturalGasContract2026TotalMember" abstract="true" name="SwapsNaturalGasContract2026TotalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="grnt_OilAndNaturalGasSalesMember" abstract="true" name="OilAndNaturalGasSalesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
