G or L (for lobby) followed by 1 isn't uncommon in the US.
> Confused me when I visited USA
It's applied inconsistently enough to be confusing for natives too!
I've just come back from the vacation in the US, and my experience was: when the hotel has G or L for the ground floor, it still has 2 for the floor directly above it. "G or L followed by 1" never happened to me.
Confused me when I visited USA.