Also, billboards begin to surface abroad, hinting at a release date.
Reddit and apparently originating at an Italian games site, they show more of one of the new protagonists, Trevor (though admittedly not doing anything we haven't already seen/totally expect him to do).
The veracity of these photos, as they are not an official release, is of course questionable but...well, c'mon that's totally him.
Grand Theft Auto 5 is set for release sometime early this year, if Rockstar Games' announcements are to be believed. It'll be out for both the PS3 and the Xbox 360, but no plans have been announced to put it out on the PC or the Wii U.