I have a room above my office, by the way it has a couple circuits running thru it with outlets but I wanted to move a heater. I used a breaker space but vs piping from an existing was as simple to stick half a pipe and a handi box, didn't need gfci and was the only thing it went to.
It used to be more practical before gfci. They cost more than a circuit breaker. In a modern garage there is some cost incentive to do more outlets on one which is often a good thing, makes it way more simple.
GFCI is the great equalizer here except foor bonding of this box, even in the event of ground fault interruption with faulty wiring,,, at any point back to the service there is still fault protection.
I got a shock in a building off a farmer rigged get up, was all wired before gfci, he wired some **** absolutely faulty, not a clue why and it would have tripped for sure as ****, he energized a floating piece of equipment. He managed to interrupt the bond theru a cord and energize it at the same time with a 3 way in a handi box with a cord,,,, no ****.
At first I went wtf I asked, this place wired by a licenced guy with a permit and it was and it took me a bit to track down this thing he added as some kind of off on, he had used a 3 way instead of a single pole, managed to hook the ground wire to it. In frickin real.
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