I have recently started using the GECK and I have found out how to do dialogue and make characters and weapons but I need someone to help me make a companion, I know how to make a basic companion that just automatically follows you but I want to know how to make one that I can ask to follow me instead of automatically doing it, all help is appreciated

If you're a GECK novice the very first mod I did on GECK was using NCCS Nosco Companion System (search on Nexus) to make a companion. I bet the first time you can have your companion up and going within an hour or two.

It doesn't have a companion wheel but other than that the companions are solid.

If you want something more advanced in terms of quests or with a companion wheel I'd highly recommend looking at various companions available at Nexus, Planet Fallout, etc., find a companion you like then study how they did it, even take that one and modify it for yourself it's fun and you learn stuff that way.

But for a beginner I'd have to say Nosco is the best bet because the tutorial is so well written and integrated with it.