The main reason you want GS is because you DON'T want to be writing macros in IB.

No offense but the IB text editor is awful.

With GS you can load up the config in something like notepad++ which is far easier on the eyes. Then make all your macros there and your macros in IB are just /click GS_MACRO_NAME_HERE

That I find to be far better but just a personal opinion.