I'm purchasing a new vehicle shortly and will transfer my Ham call sign plate from the old ride to the new one. It got me thinking about call sign license plates. I'm guessing one can get a Ham call sign license plate, they typically are distinctly marked as "Amateur Radio" etc., for any state they live in. In Michigan they are treated like a normal plate, not an expensive vanity plate, as far as fees are concerned. To get one all I had to do was show my official FCC license to the Secretary of State.
What I'm puzzled by is why no GMRS call sign license plates? It's a licensed service like Ham with an official FCC issued call sign unique to an individual.