Q: Can I use my GH3 controller with Rock Band on Wii? I don't want to buy the instrument pack yet
A: No, they are incompatible. Who's the moron who voted me down? Do you even own the Wii versions? Yes, the 360 GH controller will work with the 360 version of Rock Band. No, the Wii GH3 controller WILL NOT WORK with the Wii version of Rock Band. I OWN THEM BOTH, and can tell you with certainty that the guitars are incompatible with the other game.