Jailbreaking the Wii U is a little bit more involved as it requires some "special" equipment. It's in quotes as not many are going to have a USB A to ethernet adapter, nor a compatible model, but they aren't all that rare either. But once it's done you don't have to worry about jailbreaking it again. Dumping Wii U games isn't much harder than GC/Wii either.

Yeah, you can do the soft mod for the Wii mode on wiiu and dump your wii games. It actually might work for gc games too, I can't remember for sure.