Overloaded GFCI

I inspected a new house 2 days ago and the garage GFCI outlet was tripping when I turn the garage lights on. There were 3- 2 bulb , 4ft floresent light fixtures, a 50cfm exhaust fan and 5 outlets, connected to this GFCI outlet. The contractor could not replicate the problem. Does this GFCI sound overlaoded?

Sounds like some line leakage to me causing it to trip .
Old type Fluorescent lights could be the cause

I’m guessing that it’s a faulty ballast.

GFCI’s don’t react to an overload, they react to a fault or imbalance.