So says this pamphlet for the game, which was passed around last week at Gamescom. You don't need to be a German (or Austrian!) to make out what "4. Quartal 2009" means.
Before you ask, yes, it means Q4 2009. And before you ask, yes, it's a real Sony pamphlet, not a work of Photoshop fantasy. Now, whether the game is actually released later this year is another matter - it is Gran Turismo 5 we're talking about, after all - but with the PS3 Slim soon to be with us and a "mainstream" gaming market to win back, there's no better way to combine the two than with a new Gran Turismo game on shelves.
Or maybe even a Gran Turismo/PS3 Slim bundle!