Links that may help:
http://wiki.graal.us/ - Skyld's GS2 Documentation
http://wiki.graal.net/index.php/Creation/Dev/GScript - gBible Documentation contains a couple tutorials
http://public.zodiacdev.com/index.php?title=Fowlplay4 - Tutorial I started work on, that still needs work. Includes introduction to NC so this should interest you.
http://www.gs2.graalstudios.com/ - Twinny's scripting guide.
You can learn a lot about different functions and so on by searching previous threads, as well as working with some of the examples in the Code Gallery.
If you can't find the help you need by searching feel free to make a thread but don't abuse the privilege to the point where you're just posting and waiting for someone to finally post an entire system copy-paste solution.