Information was taken from site after data is leaked. 
Rockstar, creators of the game, not yet confirmed the release of the game.

The highly anticipated game “Grand Theft Auto V”, known as “GTA V” may be released in October, according to information responsible for the curriculum of character animation Alex O’Dwyer published on the Internet and found on the site “Joystiq”.

The curriculum has been removed from the web after the announcement date. The Rockstar has not yet manifested on the subject and not yet to confirmed the release date of the game.

However, in case the month of October is confirmed as the launch, “GTA V” will not be the first to be released this month. “GTA III” and “GTA: San Andreas,” both of Playsation 2, arrived in U.S. stores at this time.

One of the reasons why Rockstar can not release the game this year is that it has another title to hit the stores, “Max Payne 3″, on May 15. Moreover, in October, Take-Two, which the producer belongs, will launch the long awaited “Bioshock Infinite” and Ubisoft will release “Assassin’s Creed III” in the same month, which could disrupt sales of “GTA V”.