Second floor GFCI tripping from first floor light switch

[TCooper]

I have a second floor bathroom GFCI that always trips when a first floor light is turned on. When I turn off the light switch breaker the GFCI stays on. The house is approximately 7 years old. This has been an issue for approximately 6 - 8 months now.
Any suggestions?
Thanks for your help.
TCooper

 

[ishiboo]

Replace the second floor bathroom GFCI. If the issue is not solved, you've got some investigating to do.

 

[vettex2]

I just tossed the GFCI and **** , no more issues

 

[pattenp]

Until you get electrocuted.

I just tossed the GFCI and **** , no more issues