So, a friend of mine had an interesting problem, he purchased a brand new pin that obviously tested and worked well before it was shipped to him, but as soon as he plugged into a GFCI socket in his garage, it tripped the GFCI outlet.

They came and got the game, treated it again, said it worked and played fine, and then returned it.  Same problem.   What we later figured out was that they did not test it with a GFCI/DFCI outlet.

Upon getting the pin back my friend looked closer at the wiring.  Turns out on the primary power supply in the cabinet, ground and neutral were crossed.  This absolutely explains the GFCI outlet tripping, as they are designed to expect matching current on the hot and neutral lines (i.e. a  balanced load) and ground was being used as the return instead of neutral.

Switching the neutral and ground wires to where they should be resolved the issue.  The important question is, how did this game pass electrical inspection, and begs the question¹: should use of a GFCI/DFCI outlet be a required part of electrical inspection/checkout?

¹ Using this not as the logical fallacy, but as something that raises another question.