Yes you can use GW whenever you want. You can just use it as a pre-workout. You can take it in the morning here and there. You don't have to use it consistently every day but some people do.
HGH is definitely the GOAT. It's one of my favorite peptides and it definitely works well. You can always stack it with some of the healing peptides as well.
Tren is the absolute goat but has to be respected. Make sure you're using support supplements with it. Make sure you don't exceed 400mg a week unless you don't mind side effects.