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<!-- DFIN ActiveDisclosure(SM) XBRL Schema Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date      : 2019-10-28T22:20:15.2041783+00:00 -->
<!-- Version            : 5.0.0.208 -->
<!-- Package ID         : 6fd991e2efcb4b54a95a7bcea4881034 -->
<!-- Copyright (c) 2019 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
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  <xsd:element id="glt_DifferenceRecordedInEscrowAccount" name="DifferenceRecordedInEscrowAccount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="glt_AccrualForEnvironmentalLossContingenciesAssumptionOfEscrow" name="AccrualForEnvironmentalLossContingenciesAssumptionOfEscrow" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="glt_AccrualForEnvironmentalLossContingenciesAccretionOfDiscount" name="AccrualForEnvironmentalLossContingenciesAccretionOfDiscount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="glt_AccruedEnvironmentalLossContingenciesRemainingAmount" name="AccruedEnvironmentalLossContingenciesRemainingAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="glt_AmountOfTonsSold" name="AmountOfTonsSold" type="num:massItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="glt_SupplementaryDataAbstract" name="SupplementaryDataAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
</xsd:schema>
