Anyone else Gas tank make a groaning crying noise when its sitting in the garage? It goes off every few minutes. At least I think its coming from the tank. Sounds like a whine or a baby crying in the distance. I assume its air escaping or something but if you take the gas cap off and put it back on it still seems to do it.

LOL, yeah its gas expanding and then pushing past a seal somewhere, most likely your cap.
My little Kawasaki ninja moans and groans all the time, it actually has a little rubber valve that lets the expanding gas escape and it sounds like its moaning.

Kinda like aawwwwww....lets go out and ride some more..... aaawwwwww.

Would it have anything to do with a California emissions system?

Cali caps have an inlet, but no exhaust.
venting is into a carbon canister then to the carb.
I know there's a check valve in the canister that may close when the engine isn't running.  causing the mewing.