G R T

.
Last night just as I was drifting off to sleep I finally remembered the significance of the initials G.R.T. As I lay there so close to sleep I told myself to retain that knowledge as it had been bothering me all day. This morning I woke up and

a) Realised that those initials meant nothing to me and I hadn't been thinking about them at all till just before sleep.
b) No idea what they signify.
c) And now it bothers me!

So any suggestions from the floor?