Back in the day I was a big fan of GPS and bought almost anything relating to him. He came out with a program called GSP RushFit which was a big hit. The program has since been discontinued but in my opinion was still a decent in home training program for the average person.
Was it good for MMA training? Certainly not. It was almost marketing in a way that if you did the program you would be in shape to be an MMA fighter. There are much better ways to train for MMA compared to the GSP RushFit program.