While there is no GC emulator for the Wii there is on the PS3. You'll have to use that by running the PS3 emulator on the Atari 2600 emulator on your Wii and then you can run your GC games.
PS2 (FreeMcBoot and 160gig)
Wii
PSP 2000
PSP 1000
DSi XL
DSL
Xbox (softmod)
Japanese Sega Saturn (taped lever for disc swapping)
American Sega Saturn (same as above)
Dreamcast (if it counts, not that it was ever protected to begin with)
I don't know. As far as custom IOS goes, I just have the typical installed. 222,223 (v4), 249,250 (19, base 38 and 57 respectively), 202. Works fine *shrugs*