I know what you mean about not being able to find a sign!
I visited three places today where the signs had been knocked down or stolen
And another where the only "sign" was on the War Memorial (i'm keeping that one in reserve).
Abbreviations are interesting, I think CCM, BMW etc are OK as they are used instead of the full terms (After all who ever says Clewes Competition Motorcycles or Bayerish Motoren Werke).
GS is OK as it is an actual model name even if it does actually stand for Gelande Strasse (but not a lot of people know that)
Looks like you had a nice ride out!!!