I did not see any experience with GP posted here but as I like to read them I will post my experience here.

Last month I finished a cycle of GP Methan, GP Test E, and GP Stan. It was a 12 week cycle. I gained 10 kgs and I am very happy with results.
The only thing I've noticed were acne on my back.
Strength and energy were increased and I was training with 120% intensity, 5 days per week 1 hour per day.

Happy and muscular