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Does any know how these kind of setups work for shared GFCI circuits? Like if I have a couple bathrooms on the same circuit as an outdoor GFCI plug I’d like to use with 1200 watts of panels, is that doable?

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The devil is in the details of “a couple bathrooms”. Is it just led lights and ceiling fans? No problem, especially if it’s a 20A circuit. If for some reason you plug in a space heater and a hair dryer then you have issues. So you really to figure out what is/will be running to eliminate the risk of burning your house down.

Yeah that’s my worry. Curling iron, hair dryer, etc. Never more than one at a time though.

Could I move the outdoor one to a separate breaker? Or would that require rewiring everything?

Yeah you can do that. I’m not an electrician, I was raised in a family with multiple union electricians though so I know enough to be dangerous. You would need a new “home run” cable from the outlet to your main panel and this assumes your panel has space for another breaker. Snaking that cable through and stapling it so there are no loose wires will probably require breaking drywall along the path. As for the existing wires, I think best case would be if the outside outlet was the last outlet in the circuit. Then you can just disconnect them from the plug and cap them off and label as abandoned. If it’s not the last outlet but rather in between then I think you need to snake new wire to reconnect the outlets on both sides directly but not sure.

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