I'm not aware of any code that can mine forkgen coins. Porting the current code for CPU mining to GPU mining is not a trivial task. The code has to be adapted to the specific Nvidia (CUDA) or AMD (openCL) architecture. I guess you would need a good developer to do that.
Thanks for the reply butka, right now someone seems to find a block around every 20-60 minutes. This accounts for the relatively low circulating supply of coins. Do you know any way for this to be sped up? Do more people need to mine the coin to get to a faster level? I think before the coin changes I would like to make would be useful you would need to be around 5-10 minutes per block. Its hard to imagine people waiting much longer than that in a realistic use case scenario.