GMRS is a great and relatively inexpensive way to get good comms with the people around you. It's perfect for groups of offroaders, but, most areas have very little GMRS traffic outside of groups using it during their activities. If the people you wheel with have it, it's a no brainer. They're cheap and simple and work. But if you want to fool around with radios outside of that, it may be disappointing.
When I first got mine, I left it on and let it scan for a week or two to see what it picked up during my 2+ hours of daily driving. Aside from repeaters automatically sending out their callsigns, I heard three actual "conversations;" a group of people at a nearby hotel talking about getting dinner and what time they'd leave the next day, someone at a store talking said something about aisle 12 then it went to static, and two young kids talking about their walkie talkies. That's it. I put the GMRS frequencies in my ham radio and it scans them but I never hear anything other than what seems to be quite a lot of repeaters, tirelessly sending out their callsign, but never actually repeating anything.