Yez u can convert GUI to JASS but that wont help u anything, some guyz do it to look 'smarter' at the spells . I really dont know anything 'bout JASS, u should read a tutor
To what ramza said, In the trigger editor go to Edit, then to Convert to Custom Text. make sure you have duplicated the trigger first bcuz u cant convert back Then see how the trigger works using JASS If u could tell me where a tutorial is that would be helpful, Ramza but if u cant find 1 thats how to find out how JASS works
Get an mpq extractor and open up your map with it. Then open the .j file with a text editor. It will have the jass-inized map stuff, including all unit creation, regions, triggers, etc. Most of the triggers are 'call [premade function]'. You could try opening the main mpq's, I bet the premade functions are in one of them... Looking at the unit creation stuff might help a little too