Ok. Unless there is a workaround, which I would LOVE to know about, that's probably the problem. GG needs a single texture for the additional maps to work out, otherwise you end up with the default normal and the ugly bumps you have there.
I wish I knew an easy fix for you, but I have no idea and don't think there is one at this time unless I have missed something.
I'll add an avatar and a real signature someday. I think...