Yes you're on the right track. Did you remove the whole trim panel under the steering column? That makes it easier. I've also seen guys disconnect the clutch and brake pushrods too so the pedals are out of the way. The harnesses can be a real pain to disconnect. The ones on the side nearest the park brake pedal can usually be removed from the side with a long screwdriver. The ones at the back just have to be fought with. Make sure you check to see if there was any water in the fuse box of in the GEM. Usually the windshield leaks and the water drips on them.
Once you get the fuse box/GEM out there are just 4 screws that hold the GEM to the fusebox.