Thank you for the replies.
Yes, I am wanting something GPS based. I scan a lot of conventional channels, mixed in with digital ones as well, and I didn't know if there was something like an option board or external device that would enable GPS based zone changes.
I know I could get an analog radio along with the trbo, but I want to be able to change entire zones at a time based on location, some of the channels I am monitoring would not have a beacon on them.