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  <xs:element id="ggg_DeferredTaxAssetsInterestExpense" abstract="false" name="DeferredTaxAssetsInterestExpense" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ggg_ChineseRenminbiRevolvingCreditFacilityMember" abstract="true" name="ChineseRenminbiRevolvingCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ggg_CommittedFacilityMember" abstract="true" name="CommittedFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ggg_ShelfNotesMember" abstract="true" name="ShelfNotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ggg_UncommittedFacilityMember" abstract="true" name="UncommittedFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ggg_CovenantRatioAxis" abstract="true" name="CovenantRatioAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="ggg_CovenantRatioDomain" abstract="true" name="CovenantRatioDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ggg_CashFlowLeverageRatioNoAcquisitionMember" abstract="true" name="CashFlowLeverageRatioNoAcquisitionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ggg_CashFlowLeverageRatioWithAcquisitionsMember" abstract="true" name="CashFlowLeverageRatioWithAcquisitionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ggg_InterestCoverageRatioNoAcquisitionsMember" abstract="true" name="InterestCoverageRatioNoAcquisitionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ggg_InterestCoverageRatioWithAcquisitionsMember" abstract="true" name="InterestCoverageRatioWithAcquisitionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ggg_ChineseRenminbiFacilityMaximumBorrowingCapacity" abstract="false" name="ChineseRenminbiFacilityMaximumBorrowingCapacity" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ggg_FloatingRatePrincipalMaximum" abstract="false" name="FloatingRatePrincipalMaximum" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ggg_StockIncentivePlanMember" abstract="true" name="StockIncentivePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ggg_EmployeeStockPurchasePlanMember" abstract="true" name="EmployeeStockPurchasePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ggg_PreviousShareBasedPlansMember" abstract="true" name="PreviousShareBasedPlansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ggg_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfPreviousPlansReplacedBySubsequentPlans" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfPreviousPlansReplacedBySubsequentPlans" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="ggg_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOneMember" abstract="true" name="ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ggg_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeThreeMember" abstract="true" name="ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ggg_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeFourMember" abstract="true" name="ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeFourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ggg_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeFiveMember" abstract="true" name="ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeFiveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ggg_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeSevenMemberMember" abstract="true" name="SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeSevenMemberMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ggg_RealEstateFundsAndOtherInvestmentsMember" abstract="true" name="RealEstateFundsAndOtherInvestmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ggg_PensionPlanBluePlanMember" abstract="true" name="PensionPlanBluePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ggg_DefinedContributionPlanEmployerMatchingContributionForEmployeesNotCoveredByDefinedBenefitPlanPercent" abstract="false" name="DefinedContributionPlanEmployerMatchingContributionForEmployeesNotCoveredByDefinedBenefitPlanPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="ggg_DefinedBenefitPlansServicePeriodforDeterminingBenefits" abstract="false" name="DefinedBenefitPlansServicePeriodforDeterminingBenefits" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ggg_DefinedBenefitPlansServicePeriodYearsEligibleforBenefitsCalculation" abstract="false" name="DefinedBenefitPlansServicePeriodYearsEligibleforBenefitsCalculation" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ggg_PostretirementMedicalPlanAnnualCostIncreasePaidByEmployerPercentMaximum" abstract="false" name="PostretirementMedicalPlanAnnualCostIncreasePaidByEmployerPercentMaximum" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="ggg_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAbstract" abstract="true" name="DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ggg_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeTaxEffect" abstract="false" name="DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeTaxEffect" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ggg_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetOfTax" abstract="false" name="DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetOfTax" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ggg_OperatingLeaseRightofUseAssetAdditions" abstract="false" name="OperatingLeaseRightofUseAssetAdditions" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ggg_CorobS.p.A.Member" abstract="true" name="CorobS.p.A.Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ggg_ColorServiceS.r.lMember" abstract="true" name="ColorServiceS.r.lMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ggg_RedDevilEquipmentCompanyMember" abstract="true" name="RedDevilEquipmentCompanyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ggg_PeriodOneMember" abstract="true" name="PeriodOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ggg_PeriodTwoMember" abstract="true" name="PeriodTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ggg_GoodwillAndDeferredIncomeTaxesMeasurementPeriodAdjustment" abstract="false" name="GoodwillAndDeferredIncomeTaxesMeasurementPeriodAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ggg_BusinessCombinationConsiderationTransferredContingentConsideration" abstract="false" name="BusinessCombinationConsiderationTransferredContingentConsideration" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
