GFCI is tripped occasionally when exhaust fan switch is turned on or turned off. The GFCI outlet is in the bathroom and is the first outlet. It fees a second outlet which in turn feeds a switch. This switch controls three fixtures. There is a switch for the Vanity lights, the exhaust fan light and the exhaust fan. It seems that if I had it wired wrong it would trip all the time.

From an amateur
I think the gfci may be faulty

U are getting a power surge when u turn on fan. This surge with other things in line way be tripping GFI.

Try to get lights off GFI unless it is in the shower area.

Chuck