There's more ... GSP also tells TMZ Sports about his new fitness program on TV.fit -- a "well-being application" that helps people get and stay healthy!
"There's programs for everybody or people that are older, yoga. There's also a book on mental health, there's a lot of things. It's a lot more than a fitness app and there's nothing like it on the market right now."
The 39-year-old says he's still SUPER into fitness -- and he's having a blast passing his knowledge down to those looking to get fit.