What I'm asking is if a GFCI wired onto the load of another GFCI will function? Will it cause the upstream one to malfunction. Will it cause the downstream one to malfunction? It is against code?
I know I will inevitably get responses telling me there's no reason to do this or that I don't understand how to wire a GFCI. This is not what I'm asking.
(Basically the reason is that it will allow be more flexibility to switch which circuit an outdoor outlet is wired into. I will have access to a circuit for the garage (GFCI'ed) and circuit for a bedroom (AFCI'ed). Using the GFCI protected circuit form the garage just seems easiest because it will therefore also protect some other outdoor lights. But I don't know if the inspector is going to take issue with an outlet and a couple lights on the garage circuit but not in the garage. If I just put an additional GFCI on the outdoor outlet, I think it is less likely to cause issues, and if it does, I can easily move it to the other circuit.)