A simple texture edit should work. I'm just worried I might not get the feel of having gogo in the party. If you've played FFVI, you know that when you get the yellow-red-green character, you can kick ass even better. If I add colors like blue, I don't think it'll blend in correctly with the rest. So.... if you have any specific ideas about his clothing, that would be nice.
UPDATE:
Still far from being finished, but this is the direction it's going.