Form 4 Filed by Christopher Alister on May 14, 2008

This form 4 (insider trading filing) was submitted to the Securities and Exchange Commission (SEC) by insider Christopher Alister on May 14, 2008. The CIK number of this insider is 1308440. At the time of this reporting, Christopher Alister is the SVP, Gartner Events of Gartner Inc . See all insider stock transactions reported by Christopher Alister and all stock buys, sales, and option exercises made by insiders at Gartner Inc . The stock ticker symbol of Gartner Inc is IT.

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP 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: 3235-0287 Expires: February 28, 2011 Estimated average burden hours per response 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* Christopher Alister (Last) (First) (Middle) 56 TOP GALLANT RD P.O. BOX 10212 (Street) STAMFORD CT 06904-2212 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol GARTNER INC [ IT ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner X Officer (give title below) Other (specify below) SVP, Gartner Events
	3. Date of Earliest Transaction (Month/Day/Year) 05/12/2008
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/12/2008		M		7,500	A	$15.875	16,592	D
Common Stock	05/12/2008		M		10,000	A	$7.9531	26,592	D
Common Stock	05/12/2008		M		7,500	A	$9.1	34,092	D
Common Stock	05/12/2008		M		3,000	A	$7.21	37,092	D
Common Stock	05/12/2008		M		20,000	A	$8.05	57,092	D
Common Stock	05/12/2008		M		12,000	A	$12.45	69,092	D
Common Stock	05/12/2008		M		58,670	A	$10.59	127,762	D
Common Stock	05/12/2008		M		6,500	A	$22.705	134,262	D
Common Stock	05/12/2008		M		13,500	A	$14.44	147,762	D
Common Stock	05/12/2008		M		5,489	A	$21.85	153,251	D
Common Stock	05/12/2008		F		2,287 ( 4 )	D	$23.48	150,964	D
Common Stock	05/12/2008		D		13,411 ( 5 )	D	$23.48	137,553	D
Common Stock	05/12/2008		S		127,762	D	$22.8255	9,791	D
Common Stock	05/12/2008		S		6,500	D	$23.5	3,291	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Non Qualified Stock Option (Right to Buy)	$15.875	05/12/2008		M			7,500	01/28/2001 ( 1 )	01/28/2010	Common Stock	7,500	$0	0	D
Non Qualified Stock Option (Right to Buy)	$7.9531	05/12/2008		M			10,000	12/06/2001 ( 1 )	12/06/2010	Common Stock	10,000	$0	0	D
Non Qualified Stock Option (Right to Buy)	$9.1	05/12/2008		M			7,500	11/28/2002 ( 1 )	11/28/2011	Common Stock	7,500	$0	0	D
Non Qualified Stock Option (Right to Buy)	$7.21	05/12/2008		M			3,000	04/01/2004 ( 1 )	04/01/2013	Common Stock	3,000	$0	0	D
Non Qualified Stock Option (Right to Buy)	$8.05	05/12/2008		M			20,000	06/18/2003 ( 1 )	06/18/2013	Common Stock	20,000	$0	0	D
Non Qualified Stock Option (Right to Buy)	$12.45	05/12/2008		M			12,000	06/01/2005 ( 1 )	06/01/2014	Common Stock	12,000	$0	0	D
Non Qualified Stock Option (Right to Buy)	$10.59	05/12/2008		M			58,670	06/15/2005 ( 6 )	06/15/2012	Common Stock	58,670	$0	29,330	D
Non Qualified Stock Option (Right to Buy)	$22.705	05/12/2008		M			6,500	01/28/2000 ( 1 )	01/28/2009	Common Stock	6,500	$0	0	D
Stock Appreciation Rights	$14.44	05/12/2008		M			13,500	05/15/2007 ( 2 )	05/15/2013	Common Stock	13,500	$0	40,500	D
Stock Appreciation Rights	$21.85	05/12/2008		M			5,489	02/15/2008 ( 3 )	02/15/2014	Common Stock	5,489	$0	16,466	D

Explanation of Responses:

1. This option is fully exercisable.

2. The stock appreciation right becomes exercisable in four substantially equal annual installments commencing on 5/15/07.

3. The stock appreciation right becomes exercisable in four substantially equal annual installments commencing on 2/15/2008.

4. Represents shares withheld from the settlement for the payment of applicable income and payroll tax withholding due upon exercise.

5. Represents the simultaneous sale back to the company of this number of shares having an aggregrate value, based on the market price on the date of exercise, substantially equal to the aggregrate exercise price.

6. The option becomes exercisable in three substantially equal annual installments commencing one year after the date of grant, 06/15/05.

	/s/ Clare Kretzman for Alister Christopher	05/14/2008
	** Signature of Reporting Person	Date
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