Rockstar has said we can expect to hear more about Grand Theft Auto 5 in a few months time.
Answering the numerous 'Where oh where is Grand Theft Auto 5?' questions in its openAsked and Answered thread, a nameless Rockstar representative said the developer is toiling away diligently and hopes to reveal more soon."Right now, we are very hard at work on the game and are excited as well to show and tell you more as development progresses - expect that we'll be talking much more about GTAV starting at some point in a few months' time."
Last week Take-Two told investors in a financials call that development of Grand Theft Auto V is"making great progress", however it didn't provide a window of release.

http://www.computerandvideogames.com...-a-few-months/