Unfortunately you can't fork a coin away from gpu, unless you make the CPU miner closed source.. GPUS are re-programmable. you can fork away from an asic as its stuck doing one algo.
just sayin.
This is unrelated topic but you are the master coder so I will ask away. I have seen a cryptocoin that uses Japanses haiku, where cpu is used to randomly match words using haiku rules. How difficult would that be to port over to gpu? I am not coder so I wouldn't know, but it doesn't seem quantifiable. Or maybe it can be. I don't know.
Btw, new miner is cool. Dev donation is more smooth and less duplicate shares. I find that some pool does result in more duplcates, and higher the difficulty, less duplicates. And thanks for 100k diff port.