<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0204</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2011-09-08</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001164552</issuerCik>
        <issuerName>Green Energy Management Services Holdings, Inc.</issuerName>
        <issuerTradingSymbol>GRMS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001530883</rptOwnerCik>
            <rptOwnerName>Barrios Peter P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O GREEN ENERGY MANAGEMENT</rptOwnerStreet1>
            <rptOwnerStreet2>SERVICES, HOLDINGS, INC., 381 TEANECK RD</rptOwnerStreet2>
            <rptOwnerCity>TEANECK</rptOwnerCity>
            <rptOwnerState>NJ</rptOwnerState>
            <rptOwnerZipCode>07666</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Financial Officer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, $0.0001 par value</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>15207017</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Effective as of September 8, 2011, the Reporting Person was appointed as the Chief Financial Officer of the Issuer.</footnote>
        <footnote id="F2">The shares of the Issuer's common stock, $0.0001 par value (the &quot;Common Stock&quot;), reported herein are beneficially owned as follows: (i) 15,069,683 shares of Common Stock are directly beneficially owned by Omni Consulting LLC (&quot;Omni&quot;), (ii) 104,000 shares of Common Stock are directly beneficially owned by the Reporting Person and (iii) 33,334 shares of Common Stock are jointly beneficially owned by the Reporting Person and Loren R. Barrios, the Reporting Person's spouse, as Tenants in Common.  The Reporting Person is the sole member of Omni.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Peter P. Barrios</signatureName>
        <signatureDate>2011-09-22</signatureDate>
    </ownerSignature>
</ownershipDocument>
