Comment on Upgrading ungrounded two-prong outlets to grounded three-prong?
SkyNTP@lemmy.ml 2 weeks ago
I would not try to create a separate path to ground. The ground should be bonded to neutral at one and only one place: at or just behind the main panel.
GFCI is rated to protect two wire receptacles downstream of the GFCI, but check with the local authorities on the subject. Since this is an outdoor circuit, you want GFCI there anyway.