FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL OMB Number: 3235-0104 Expires: January 31, 2005 Estimated average burden hours per response... 0.5

(Print or Type Responses)

1. Name and Address of Reporting Person *   Bingle Michael J 2. Date of Event Requiring Statement (Month/Day/Year) 10/19/2004 3. Issuer Name and Ticker or Trading Symbol GARTNER INC [IT] (Last) (First) (Middle) 2725 SAND HILL RD, STE 150 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) MENLO PARK, CA 94025 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5) Class A Common Stock 37,740,128 I (1) (2) See footnotes (1) and (2).

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
	Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Bingle Michael J 2725 SAND HILL RD, STE 150 MENLO PARK, CA 94025	  X	Â	Â	Â

Signatures

/s/ Michael J. Bingle		10/25/2004
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Owned by Silver Lake Partners, L.P., Silver Lake Investors, L.P. and Silver Lake Technology Investors, L.L.C. (collectively, the ??Silver Lake Entities??). Silver Lake Technology Associates, L.L.C. is the General Partner of each of Silver Lake Partners, L.P. and Silver Lake Investors, L.P. Mr. Bingle, who is on the Board of Directors of Gartner, Inc., is a Managing Director of Silver Lake Technology Associates, L.L.C. As such, Mr. Bingle could be deemed to have shared voting or dispositive power over the shares owned by the Silver Lake Entities. Mr. Bingle, however, disclaims beneficial ownership in these shares, except to the extent of his pecuniary interest therein.
(2)	Mr. Bingle is a Managing Director of Silver Lake Technology Associates, L.L.C., which is the General Partner of Silver Lake Partners, L.P. Silver Lake Partners, L.P. and its affiliated entities are members of a Section 13(d) ??group?? as reflected in a Schedule 13D originally filed on April 15, 2003 with the Securities and Exchange Commission, as amended. The shares of the issuer owned by the members of the ??group?? in the aggregate exceed 10%. Silver Lake Partners, L.P. and its affiliated entities disclaim a pecuniary interest in the shares held by the other members of the 13(d) ??group?? and Mr. Bingle disclaims beneficial ownership in the shares held by the ??group??, except to the extent of his pecuniary interest in the shares held by Silver Lake Partners, L.P. and its affiliated entities.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.