not having a GPS in the 911 is probably the only modern thing i want in this car... I hate windshield mountes so i looked to the Modshack for a solution on this....
Steve has a GadgeTT that he has conjured up for the Audi TT community that works perfectly on the 911 gauges......here is a setup specifically for the Garmin Nuvi...
This mount fits slickly over the clock or the fuel/oil level gauge.....
Mounted around gauge....
Nuvi mounted in a perfect spot....
The nice part about this solution is that it could be used for ANYTHING...IPOD, Phone mount....even a camera mount centerboard....
If there was anything heavy that would need to be mounted here, I would probably put a dab of silicone on the edge of the gauge to hold the ring in place...
Steve has a ton of solutions here...
http://public.fotki.com/ttschwing/gadgetts_and_stuff/the_gadgett/
My understanding he has a big shipment of these coming in shortly (like 2 weeks)....and for those that are interested in different colors, or finishes...contact Steve....he does his own powder coating!
PM me is you want more pix or info...