I have one 20 amp dedicated circuit for my garage for 4 outlets. I want to add another outlet in my garage and put in two LED lights in the garage attic by wiring into an existing 20 AMP circuit that only feeds 3 receptacles in a family room that backs up to the garage. I will be protecting the circuit with a GFCI/AFCI breaker. Does code permit having an outlet in the garage that shares a circuit with the living quarters even though I already met the portion of the code requiring a dedicated circuit for outlets or do all outlets need to be on a separate circuit from the living area?

 

Since you've already met the code..... I don't see a reason why you can't do what you want.
I couldn't find a place in the code that said you cannot do that.