What model GTR have you got? Custom plates? I will keep any eye out, I ride from Cheltenham to the City and back every week day.
I was allowed to get IDIOT as its suggests that the rider of the bike is the idiot. As opposed to if it were on a car, suggesting that the other motorists are IDIOT's. That was how it was explained to me.
I have had the plate for almost 4 years now I think, and I ride every day. I have been pulled over 2 times. Both for riding on a footpath (when I park my bike).