Just found out that they have a specific side project for the GPUs...
http://milkyway.cs.rpi.edu/milkyway_gpu/
But seems to be something for testing purposes only, it's closed account creation, no WUs, no apps, and even some errors on the website...
But even so, here we are, AMD Users!
http://milkyway.cs.rpi.edu/milkyway_....php?teamid=15