Thanks for the reply.
One more question. For the outlets and switches in the common wall, how do I get them into the stud bays when the requirement is that the sheetrock extend from floor to roof? Normally, I would drill down through the top plate or up through open joists and sub-floor to make a hole to pass the cable through and fish to the box. Now I don't have that option because the sheetrock must extend from garage floor to roof. The floor is a slab and the roof is out of the question.
So how do you pass cables through a fire-rated wall? Is there some special fire-rated box that is used or is it some type of fire-proof caulking that goes around the cables? It has to be something that maintains the fire-resistance or there wouldn't be much point to making the wall covering fire-resistant.