If you can make it appear in the OS as a directinput/xinput device, Dolphin can use it in emulated wiimote mode. You just set the connected extension to "guitar" and bind the controls one by one.
I have no idea how functional latency wise that is but I don't see why it wouldn't be usable.
I have no idea how functional latency wise that is but I don't see why it wouldn't be usable.
