The list on this site is about as current as you'll find. I think this site says there are 9 or 10 GMRS repeaters locally. Last I counted, there were actually over 20. GMRS frequencies aren't private, but owners can refuse use of their repeaters to anyone and many often do. It's possible your town has a few that are unlisted. If you have access to a scanner, that would be a good place to start, but if you do find any, make sure you get permission before you start using it. There's also the option to build your own repeater.