I presume its the same for a 11 as for an 1150.........if so, a "Migsel mount" from a member of this forum (search under MiGSel's name) fits over the clocks.
Alternatively a Ram Mount is what you need. This would attach to the handle bar and angle to where you need it - works for me anyway.
If look on Migsel's site it shows his speedo bracket on the 1100GS with a RAM 1" ball to this use short arm RAM-B-201-A and round base RAM-B-202 to attach onto the Garmin cradle.
A search amongst this forum section should also unearth images from earlier days.