<rant>
It would be difficult to distinguish GMRS from ham. So it's a Scout's Honor sort of thing. I would advise that if you hold an Amateur license that you really should know better and be a good steward, though. It's very difficult to argue that you didn't understand what you're doing to the F.C.C. We hams are given significant leeway by the F.C.C. compared to other services so please don't abuse it.
My point here is at least get your GMRS license and consider repurposing a commercial radio or getting an actual GMRS type approved radio instead of free banding your ham radios. Trust me, I get it, I really do. It's silly to have to carry a CB and GMRS and FRS and ham radio. It's the 21st century after all and convergence is the name of the game and all the hardware is essential the same now.
</rant>
Locally you have hams, you're just saying the 4x4 users don't use ham. There's going to be a handful I bet, though. Since your CB died and you haven't missed it why get anything? What are you trying to accomplish? There's even fewer GMRS users than amateur radio, so if you're just in search of something that's not a good option. You're better off with a good pair of hiking boots or a cell phone booster. It seems to always fall back to CB for 4x4, nobody wants it but it's what most people still have because most other people still have it too.Seems to me, that the new GMRS radio's, would make CB's go the way of the DoDo birds. Longer range, simpler antenna, etc.
I had a CB, but I had to re-tune the antenna every time I switched between hard and soft tops. Unit quit working. So now I'm on the fence on what to replace with?
If I go GMRS, will I have anyone to talk to. Locally, no one uses Ham.
Is it actually harmful to anyone to use GMRS frequencies on a ham radio?