Heh. Author of GG here. This may be the first negative feedback I've had since I made the program in 2014, so thanks for that! (negative feedback is in general more useful than positive feedback). You have unusual taste, to say the least. I would ask you what you don't like, but, it really doesn't matter, as the output of GG was not really designed, it was more like it just "happened". The math does what the math does, and that's all there is to it. Good luck in your search for gas giants that appeal to you.
Edit: to wpetula, if you're trying for something like Uranus, you can get that out of GG, just depends what input image you feed it.