Ocarina (along with action replay and usb gecko codes) just unlock content in games to be loaded at times they arent supposed to be loaded. It is impossible to have a code do "something" to "something" in a game to get "something" completely NOT related to the game. For example, replacing donkey kong in SSBB with masahiro sakurai's grandmother thus making it impossible to play as his grandmother. Or in this case, using a wiiremote to control a game without wiiremote support. The support is not in the game, so it CANNOT be unlocked for use.
Your best bet is to rip open gh:3 and look at all the files. If you can some how magically find the controls file, transfer it into gh:wt. I highly doubt anyone can do this, though, since it requires incredible knowledge about information that is unknown to anyone but the developers of the game.
