We had multiple GFI receptacles in our CS 3719, even had one in the basement. My guess would be you haven't found the one associated with that receptacle yet. From memory, we had one in the BR. One in the kitchen, and one in the basement.
As mentioned, these are all powered off the circuit breakers, no fuses in line.
Cycle through your AC breakers, sometimes the tripped circuits are not as obvious and you may find it be actually moving the breakers.
Lastly, power up the fridge circuit and make sure it isn't the breaker feeding the receptacle without power.
Mary Beth and John + Billy and Barcelona our traveling fur babies,
2021 Entegra Cornerstone 45 F/2019 Chevy Colorado toad
(2019 Newmar Canyon Star)(traded in)