I'm in a similar as situation described here: Can a mud ring be used in reverse?
This seems bad.
There's no ground conductor outside in the octogon.
I thought I'd replace the switch with a GFCI switch for a little extra protection.
The GFCI manual says "The load must be grounded". Is this true? I found this here: https://www.electricaltechnology.org/2020/04/wire-gfci-combo-switch-outlet.html#wiring-a-gfci-combo-switch-outlet-with-a-light-bulb
which seems to say I can do what I think I want, but it's a cartoon.
Is this possible and if so, is it worth doing?