I have been using mods in GTA Online thanks to MPGH, but it was a shame to see no good free menu's on it anymore.
If you are a mod developer, and want to know how to do so just message me. I don't want to share it here as Rockstar may read then patch it. This method has worked on a different game, even though it is detected and is a loophole so you can't get banned but only kicked.