Originally Posted by LukasM
How would you "lower at the frame"?
They certainly don't use a different pick-up point for the shock, and that's not even possible for the forks.
The F800GS has pretty bad ground clearance to begin with, so if you are riding real off-road I'd try the low seat first, that along with sliding your butt over on stopping should work for most people except the really small ones.
If you ride only on the street or gravel roads then go ahead and shorten the suspension.
It's an option for the F800GS they lower the frame and the seat so that the bike gets from 880mm to 820mm.