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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                 Amendment No. 4
                                   Schedule TO
            Tender Offer Statement Under Section 14(d)(1) or 13(e)(1)
                     of the Securities Exchange Act of 1934

                                   ----------

                                  Gartner, Inc.
                       (Name of Subject Company (Issuer))
                             Gartner, Inc. (Issuer)
 (Name of Filing Person (Identifying Status as Offeror, Issuer or Other Person))


                    Common Stock, Class A, $0.0005 Par Value
                    Common Stock, Class B, $0.0005 Par Value

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                         (Title of Class of Securities)

                        Common Stock, Class A, 366651107
                        Common Stock, Class B, 366651206

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                      (CUSIP Number of Class of Securities)

                             Lewis G. Schwartz, Esq.
                                 General Counsel
                                  Gartner, Inc.
                                 P.O. Box 10212
                               56 Top Gallant Road
                             Stamford, CT 06902-7747
                               Tel: (203) 316-1111

   (Name, address and telephone number of person authorized to receive notices
                 and communications on behalf of filing person)

                                   ----------

                                   Copies to:
                             Larry W. Sonsini, Esq.
                              Robert Sanchez, Esq.
                              Michael S. Dorf, Esq.
                        Wilson Sonsini Goodrich & Rosati,
                            Professional Corporation
                               650 Page Mill Road
                               Palo Alto, CA 94304
                               Tel: (650) 493-9300

                           CALCULATION OF FILING FEE
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   Transaction Valuation*                               Amount of Filing Fee**
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      $226,853,122.50                                          $28,742
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* Calculated solely for purposes of determining the amount of the filing fee.
Pursuant to rule 0-11(b)(1) of the Securities Exchange Act of 1934, as amended,
the Transaction Valuation was calculated assuming that 11,298,630 outstanding
shares of Common Stock, Class A, and 5,505,305 outstanding shares of Common
Stock, Class B, are being purchased at the maximum possible tender offer price
of $13.50 per share.

** The amount of the filing fee, calculated in accordance with Rule 0-11(b)(1)
of the Securities Exchange Act of 1934, as amended, and Fee Rate Advisory #7 for
Fiscal Year 2004 issued by the Securities and Exchange Commission, equals
$126.70 per million of the value of the transaction.

|X|  Check the box if any part of the fee is offset as provided by Rule
     0-11(a)(2) and identify the filing with which the offsetting fee was
     previously paid. Identify the previous filing by registration statement
     number, or the Form or Schedule and the date of its filing.

     Amount Previously Paid:  $28,742
     Form or Registration No.:  Schedule TO
     Filing Party:  Gartner, Inc.
     Date Filed:  June 22, 2004

|_|  Check the box if the filing relates solely to preliminary communications
     made before the commencement of a tender offer.

Check the appropriate boxes below to designate any transactions to which the
statement relates:

|_|  third party tender offer subject to Rule 14d-1.
|X|  issuer tender offer subject to Rule 13e-4.
|_|  going-private transaction subject to Rule 13e-3.
|_|  amendment to Schedule 13D under Rule 13d-2.

Check the following box if the filing is a final amendment reporting the results
of the tender offer:
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This Amendment No. 4 amends and supplements the Tender Offer Statement on
Schedule TO originally filed with the Securities and Exchange Commission on June
22, 2004 (the "Schedule TO") by Gartner, Inc., a Delaware corporation (the
"Company"), relating to the offer by the Company to purchase for cash up to
11,298,630 shares of its Common Stock, Class A, par value $0.0005 per share
("Class A Shares"), and 5,505,305 shares of its Common Stock, Class B, par value
$0.0005 per share ("Class B Shares," and together with the Class A Shares, the
"Shares"), including, in each case, the associated preferred stock purchase
rights issued under the Amended and Restated Rights Agreement, by and between
the Company and Mellon Investor Services LLC (as successor Rights Agent of Fleet
National Bank), as amended by Amendment No. 1 to the Amended and Restated Rights
Agreement, dated as of June 30, 2003, at a price of not more than $13.50 nor
less than $12.50 per share, net to the seller in cash, without interest, upon
the terms and subject to the conditions set forth in the offer to purchase,
dated June 22, 2004 (the "Offer to Purchase") and the accompanying letters of
transmittal (the "Letters of Transmittal"), which together, as each may be
amended and supplemented from time to time, constitute the tender offer. This
Amendment No. 4 is intended to satisfy the reporting requirements of Rule
13e-4(c)(3) of the Securities Exchange Act of 1934, as amended. Copies of the
Offer to Purchase and the accompanying Letters of Transmittal were previously
filed with the Schedule TO as Exhibits (a)(1)(A), (a)(1)(B)(i) and
(a)(1)(B)(ii), respectively, and are amended hereby.

The information in the Offer to Purchase and the accompanying Letters of
Transmittal, copies of which are attached to this Schedule TO as Exhibits
(a)(1)(A), (a)(1)(B)(i) and (a)(1)(B)(ii), respectively, is incorporated in this
Amendment No. 4 to the Schedule TO by reference in response to all of the
applicable items in the Schedule TO, except that such information is hereby
amended and supplemented to the extent specifically provided herein.

This Amendment No. 4 is filed to incorporate revisions made to the Offer to
Purchase, to among other things remove the financing condition, and the Letters
of Transmittal.

ITEM 10. FINANCIAL STATEMENTS.

(a);(b) Financial Information; Pro Forma Information. Not applicable.
Notwithstanding that financial statements are not required pursuant to the
Instruction 2 to Item 10, the Company has provided a summary of selected
historical financial information and selected pro forma financial information
for its most recent fiscal year and most recent fiscal quarter, and has
incorporated by reference certain documents filed with the Securities and
Exchange Commission, in Section 10 of the Offer to Purchase.





                                    SIGNATURE

     After due inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this Schedule TO is true, complete and
correct.

                                        GARTNER, INC.

                                        /s/  Christopher Lafond
                                        ---------------------------------------
                                        Christopher Lafond
                                        Executive Vice President and Chief
                                        Financial Officer


Date: July 23, 2004


                                INDEX TO EXHIBITS

 Exhibit
 Number       Description
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(a)(1)(A)     Offer to Purchase, dated June 22, 2004 (revised July 23, 2004).

(a)(1)(B)     (i) Letter of Transmittal, Common Stock, Class A.

              (ii) Letter of Transmittal, Common Stock, Class B.

(a)(1)(C)     (i) Notice of Guaranteed Delivery, Common Stock, Class A.*

              (ii) Notice of Guaranteed Delivery, Common Stock, Class B.*

(a)(1)(D)     Letter to brokers, dealers, commercial banks, trust companies and
              other nominees, dated June 22, 2004.* (a)(1)(E) Letter to clients
              for use by brokers, dealers, commercial banks, trust companies and
              other nominees, dated June 22, 2004.*

(a)(1)(F)     Notice to participants in the Gartner, Inc. Savings and Investment
              Plan, dated June 22, 2004.*

(a)(1)(G)     Letter from the Trustee of the Gartner, Inc. Savings and
              Investment Plan to the participants in the plan, dated as of June
              30, 2004.***

(a)(1)(H)     Trustee Direction Form for participants in the Gartner, Inc.
              Savings and Investment Plan.***

(a)(2)        Not Applicable.

(a)(3)        Not Applicable.

(a)(4)        Not Applicable.

(a)(5)(A)     Summary Advertisement, dated June 22, 2004.*

(a)(5)(B)     Gartner Tender Offer - Questions and Answers for Gartner
              employees.**

(b)(1)        Commitment Letter, dated June 17, 2004, by and between the
              Company, J.P. Morgan Securities Inc. and JPMorgan Chase Bank.*

(d)(1)        Stock Purchase Agreement, dated as of June 17, 2004, among the
              Company and Silver Lake Partners, L.P., Silver Lake Investors,
              L.P., and Silver Lake Technology Investors, L.L.C.*

(d)(2)        Amended and Restated Securityholders Agreement, dated as of July
              12, 2002, among the Company, Silver Lake Partners, L.P. and other
              parties thereto, incorporated by reference from the Company's
              Annual Report on Form 10-K as filed on December 29, 2002.

(d)(3)        1991 Stock Option Plan as amended and restated on October 12,
              1999, incorporated by reference from the Company's Annual Report
              on Form 10-K filed on December 22, 1999.

(d)(4)        1993 Director Stock Option Plan as amended and restated on April
              14, 2000, incorporated by reference from the Company's Annual
              Report on Form 10-K as filed on December 29, 2000.

(d)(5)        2002 Employee Stock Purchase Plan, as Amended and Restated
              February 5, 2003, incorporated by reference from the Company's
              Form 10-Q as filed on August 14, 2003.

(d)(6)        1994 Long Term Stock Option Plan, as amended and restated on
              October 12, 1999, incorporated by reference from the Company's
              Annual Report on Form 10-K filed on December 22, 1999.

(d)(7)        1998 Long Term Stock Option Plan, as amended and restated on
              October 12, 1999, incorporated by reference from the Company's
              Annual Report on Form 10-K filed on December 22, 1999.

(d)(8)        1996 Long Term Stock Option Plan, as amended and restated on
              October 12, 1999, incorporated by reference from the Company's
              Annual Report on Form 10-K filed on December 22, 1999.

(d)(9)        1999 Stock Option Plan, incorporated by reference from the
              Company's Form S-8 as filed on February 16, 2002.

(d)(10)       2003 Long-Term Incentive Plan, incorporated by reference from the
              Company's Proxy Statement for its annual meeting dated February
              13, 2003.

(d)(11)       Employment Agreement between Michael D. Fleisher and the Company
              as of October 1, 2002, incorporated by reference from the
              Company's Annual Report on Form 10-K as filed on December 29,
              2002.

(d)(12)       Amendment to Employment Agreement between Michael D. Fleisher and
              the Company dated as of April 29, 2004, incorporated by reference
              from the Company's Quarterly Report on Form 10-Q as filed on May
              4, 2004.

(d)(13)       Employment Agreement between Maureen O'Connell and the Company
              dated as of October 15, 2002 and effective as of September 23,
              2002, incorporated by reference from the Company's Annual Report
              on Form 10-K as filed on December 29, 2002.

(d)(14)       Employment agreement between Zachary Morowitz and the Company
              dated as of January 20, 2003, incorporated by reference from the
              Company's Transition Report on Form 10-KT as filed on March 31,
              2003.

(d)(15)       Amended and Restated Rights Agreement, dated as of August 31,
              2002, between the Company and Mellon Investor Services LLC, as
              Rights Agent, with related Exhibits, incorporated by reference
              from the Company's Annual Report on Form 10-K as filed on December
              29, 2002.

(d)(16)       Amendment No. 1 to the Amended and Restated Rights Agreement,
              dated as of June 30, 2003, between the Company and Mellon Investor
              Services LLC, as Rights Agent, incorporated by reference from the
              Company's Amendment No. 2 to Form 8-A as filed on June 30, 2003.

(g)           Not applicable.

(h)           Not applicable.

*    Previously filed with Schedule TO on June 22, 2004.

**   Previously filed with Amendment No. 1 to Schedule TO on June 23, 2004.

***  Previously filed with Amendment No. 2 to Schedule TO on June 30, 2004.