-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 KfutkSodXFcfP01spx1rjX8ziJ6Vz6O8UHy2dZuhiWw3qQNfSrV5JZOFjPooBNtr
 DienR2HrVIuAX0fkMOVujQ==

<SEC-DOCUMENT>0001129787-04-000067.txt : 20040702
<SEC-HEADER>0001129787-04-000067.hdr.sgml : 20040702
<ACCEPTANCE-DATETIME>20040702130048
ACCESSION NUMBER:		0001129787-04-000067
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040630
FILED AS OF DATE:		20040702

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			GARTNER INC
		CENTRAL INDEX KEY:			0000749251
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-MANAGEMENT SERVICES [8741]
		IRS NUMBER:				043099750
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		56 TOP GALLANT RD
		STREET 2:		P O BOX 10212
		CITY:			STAMFORD
		STATE:			CT
		ZIP:			06904-2212
		BUSINESS PHONE:		2039640096

	MAIL ADDRESS:	
		STREET 1:		56 TOP GALLANT RD
		STREET 2:		P O BOX 10212
		CITY:			STAMFORD
		STATE:			CT
		ZIP:			06904-2212

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	GARTNER GROUP INC
		DATE OF NAME CHANGE:	19930823

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			VA PARTNERS LLC
		CENTRAL INDEX KEY:			0001129787
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14443
		FILM NUMBER:		04898560

	BUSINESS ADDRESS:	
		STREET 1:		435 PACIFIC AVENUE
		STREET 2:		FOURTH FLOOR
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94133
		BUSINESS PHONE:		4153623700

	MAIL ADDRESS:	
		STREET 1:		435 PACIFIC AVENUE
		STREET 2:		FOURTH FLOOR
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94133

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			UBBEN JEFFREY W
		CENTRAL INDEX KEY:			0001159187
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14443
		FILM NUMBER:		04898561

	BUSINESS ADDRESS:	
		STREET 1:		ONE MARITIME PLAZA, SUITE 1400
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94111
		BUSINESS PHONE:		4153623700

	MAIL ADDRESS:	
		STREET 1:		435 PACIFIC AVENUE, FOURTH FLOOR
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94133
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2004-06-30</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000749251</issuerCik>
        <issuerName>GARTNER INC</issuerName>
        <issuerTradingSymbol>IT</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001159187</rptOwnerCik>
            <rptOwnerName>UBBEN JEFFREY W</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>435 PACIFIC AVENUE, FOURTH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94133</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001129787</rptOwnerCik>
            <rptOwnerName>VA PARTNERS LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>435 PACIFIC AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>FOURTH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>SAN FRANCISCO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94133</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Director Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>13.22</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2004-06-30</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>15000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2005-06-30</value>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2014-06-30</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>15000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>15000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F3"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Options granted under Non-Qualified Stock Option.  The options to buy shares of Gartner, Inc. become vested in 5,000 increments on 06/30/05, 06/30/06, 06/30/07.</footnote>
        <footnote id="F2">Column 8 is not a required reportable field.</footnote>
        <footnote id="F3">Under an agreement with ValueAct Capital Partners, L.P., Jeffrey W. Ubben is deemed to hold the options for the benefit of ValueAct Capital Partners, L.P., ValueAct Capital Partners II, L.P. and ValueAct Capital International, Ltd. and indirectly for VA Partners, LLC as general partner of ValueAct Capital Partners, L.P. and ValueAct Capital Partners II, L.P. as the investment adviser of ValueAct Capital International, Ltd.  Jeffrey W. Ubben is a director of Gartner, Inc. and Managing Member of VA Partners, LLC.  Peter H. Kamin and George F. Hamel are Managing Members of VA Partners, LLC, the General Partner of ValueAct Capital Partners, L.P. and ValueAct Capital Partners II, L.P. and investment adviser of ValueAct Capital International, Ltd. The reporting persons disclaim beneficial ownership of the reported options except to the extent of their pecuniary interest therein.</footnote>
    </footnotes>

    <remarks>Joint Filer Information

Name: ValueAct Capital Partners, L.P.
Address: 435 Pacific Avenue, 4th Floor, San Francisco, CA  94133
Designated Filer: Jeffrey W. Ubben
Issuer and Ticker Symbol: Gartner, Inc. (IT)
Date of Event Requiring Statement: June 30, 2004

Name: ValueAct Capital Partners II, L.P.
Address: 435 Pacific Avenue, 4th Floor, San Francisco, CA  94133
Designated Filer: Jeffrey W. Ubben
Issuer and Ticker Symbol: Gartner, Inc. (IT)
Date of Event Requiring Statement: June 30, 2004

Name: ValueAct Capital International, Ltd.
Address: 435 Pacific Avenue, 4th Floor, San Francisco, CA  94133
Designated Filer: Jeffrey W. Ubben
Issuer and Ticker Symbol: Gartner, Inc. (IT)
Date of Event Requiring Statement: June 30, 2004

Name: VA Partners, L.L.C.
Address: 435 Pacific Avenue, 4th Floor, San Francisco, CA  94133
Designated Filer: Jeffrey W. Ubben
Issuer and Ticker Symbol: Gartner, Inc. (IT)
Date of Event Requiring Statement: June 30, 2004

Name: George F. Hamel, Jr.
Address: 435 Pacific Avenue, 4th Floor, San Francisco, CA  94133
Designated Filer: Jeffrey W. Ubben
Issuer and Ticker Symbol: Gartner, Inc. (IT)
Date of Event Requiring Statement: June 30, 2004

Name: Peter H. Kamin
Address: 435 Pacific Avenue, 4th Floor, San Francisco, CA  94133
Designated Filer: Jeffrey W. Ubben
Issuer and Ticker Symbol: Gartner, Inc. (IT)
Date of Event Requiring Statement: June 30, 2004</remarks>

    <ownerSignature>
        <signatureName>By: /s/ Jeffrey W. Ubben</signatureName>
        <signatureDate>2004-07-02</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>VALUEACT CAPITAL PARTNERS, L.P., BY VA PARTNERS, L.L.C., ITS GENERAL PARTNER By: /s/ George F. Hamel, Jr. Managing Member</signatureName>
        <signatureDate>2004-07-02</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>VALUEACT CAPITAL PARTNERS II, L.P., BY VA PARTNERS, L.L.C., ITS GENERAL PARTNER By: /s/ George F. Hamel, Jr. Managing Member</signatureName>
        <signatureDate>2004-07-02</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>VALUEACT CAPITAL INTERNATIONAL, LTD., BY VA PARTNERS, L.L.C., ITS INVESTMENT MANAGER By: /s/ George F. Hamel, Jr. Managing Member</signatureName>
        <signatureDate>2004-07-02</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>VA PARTNERS, L.L.C. By: /s/ George F. Hamel, Jr. Managing Member</signatureName>
        <signatureDate>2004-07-02</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>By: /s/ George F. Hamel, Jr.</signatureName>
        <signatureDate>2004-07-02</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>By: /s/ Peter H. Kamin</signatureName>
        <signatureDate>2004-07-02</signatureDate>
    </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----