the germans are to blame!
when LGB made a new line of toys in 1968, they called them "Gartenbahn" and "Grossbahn" (English: "Gardentrain" and "Largetrain" )
the rest was pride and confusion.
the British influenced world named that stuff "G Scale".
the US influenced world settled for "Largescale".
both misnamed.
because the world of "G" scales consists of many scales. but just one "Gauge" ("Guage" for the Northamericans).
in short, the German word "Gummi" translates as "Rubber".
so, "G-scale" = "rubber-scale".
