GS1 is a lot different than GS2. It's better that you start off with having some background knowledge of how to program in other languages. Knowing the basics of programming will definitely help you.

PHP is really great: http://en.wikipedia.org/wiki/PHP
Also Java: http://en.wikipedia.org/wiki/Java_(p...ming_language)

But if you'd like to just jump into GraalScript (Which I don't recommend) you should definitely check out FP4's scripting guide: http://public.zodiacdev.com/index.php?title=Fowlplay4. Though, you will need NPC-Server access on a Graal Server.

Also if you need any help with GraalScript, there are some great examples on the Official GraalOnline forums: http://forums.graal2001.com/forums/forumdisplay.php?f=8