If you're looking to get big, gh by itself is not the way to go. It's really not all that anabolic, either with or without gear.
I personally think it's a waste of time for anyone wanting to use it for anything other than its anti-aging/revcovery/health benefits.
I'm 50, have beenusing it for years, but if I want to get big, I use gear that would cost 1/10 as much.
One more thing. If I were in my 20s, I wouldn't use it for anything unless I was sitting on a pile of money.