This game in the GTA series is Made as a half way point between GTA V and VI. It allows players to explore Atlanta Georgia and the surrounding areas in Georgia. It has about 49 Vehicles and is purely Free roam and your character is purely customizable. It currently has good rated graphics ever. The game is supposed to have reused GTA 4 graphics, so Nintendo DS and Mobile phones can handle it.
There id not much more info on the game but there is a vehicles page for all the vehicles that appear in the game. (Vehicle brands)