There already is a similar thread called GTA Wii in the gaming section. And I'm getting the feeling you just made the tread to say how dumb the Wii is, when it's something totaly new and I'm almost sure you never have even used it. It's more fun than a ps3, it just lacks the power.
Anyway, GTA for the Wii would be great in my opinion. Just don't know how you can make a game with all those featers playable with the Wii-mote and Nunck-chuck.