Are there any servers I can learn GS2 on?
 

I'm new to this forum so not sure if this is on right spot.. Anyways, I would like to start learning/scripting GS2 and I am looking for a server I would be able to practice or help on. Thanks in advance.

No, Testbed is gone you're out of luck. Graal has no environment for you to test on. Sorry.
Though there is one server called "GS2 School" that I'm guessing serves that purpose, but you need a gold account to access it. I believe the person who runs it goes by the account name Stowen. Good luck!