At the end of 2007, we reported that Gary Dale was leaving Rockstar to become the new Executive Vice President of Take-Two. Now, just a little longer than a year later, he has announced that he is leaving Take-Two completely, but so far has not given a reason for it.

Gaming news site GamesIndustry reported:

He was considered a valuable member of the Take-Two team, and was previously chief operating officer of Grand Theft Auto house Rockstar Games.
Dale's employment with the company will be terminated officially on April 15, 2009.

Source: GamesIndustry.Biz