don't worry you will. even if it isn't with both feet. I am 6' and I touch (uncharged) with the toes of my both feet. Charged I have my feet flat on the ground (oh and of course I'm riding a GS).
Anyway if you are afraid of hight you can order the lower seat for the GS or lower the suspensions (Touratech is proposing a nice kit) and gain about 5cm.
Keep the smile on your face!
F800GS - The ORANGE ones are faster!!