What Does GS Stand for?

 
Gelände/Straße

You bought the bike and somebody is going to ask. Be ready.
GS is actually G/S meaning Gelande/Strasse, German for off-road/road. The first Adventure Bike built with the intention of seamless travel regardless of the landscape.
The bike that can go anywhere, and does.

In 1980 BMW introduced the R80G/S and began competing in the Paris to Dakar Race… Only 81 of the 216 competitors finished that year, but we’ve never looked back.  
The GS is now the best selling motorcycle BMW offers with sales steadily increasing year over year, and some might say the best bike ever.