Geez~!
C'mon you guys - Somebody help this lady out!
I know we have engineers on here - very bright guys....probably even brighter women....give her some options!
I drill out locks at work sometimes - but this is not an option here!
A locksmith could not 'pick' it?!
Is something in there? A bit of the key, or some debris ? Anything that might come out with a strong magnet?
Blow it out with one of those computer/cleaner cans of compressed air?
A bit of graphite powder, WD40 ?
Did a vandal slip something in the key hole? (I don't know if your gas cap is hidden, or out in the open like a motorcycle)
Dadgum, this would drive any of us nuts if we were getting low on gas, and we need to use our scoot and we can't get the bleedin' cap off!
I hope some smart scooterist will jump in here and help you out!
If you do solve this - please post how you fixed it.
Good luck,
Stig, in the Ohio corn