According to emerging reports Grand Theft Auto V is set to be released between March and May of next year. Pre-order posters published on GTA-Five.pl reveals the words "Pre-order now. Spring 2013."
Recently a March 1 release date was briefly posted by online retailer GameStop.co.uk, and Rockstar has a tradition of launching around that time of the year, so it's entirely likely that this report is accurate and we can start looking forward to the highly anticipated return of the GTA franchise.