Trying to identify a Breaker in my electric panel...

groundhogy wrote:
The issue is this...lol

When I connect my christmas lights up through a very old extension cord to my outside sockets, and if it rains, the breaker being discussed trips quite a bit

This explains your problem nicely. The GFCI is DESIGNED to trip if there is any current leakage. The old lights or extension cord, when wet, has some current leakage, ergo, the GFCI trips. It is supposed to trip. It is doing its job. A replacement will do exactly the same thing.