Nope, unfortunately Bluetooth is only part of the requirement... the
end device (the Zumo in this case) must still be able to run our GS-911 mobile
application, which the Zumo is not capable of doing - they don't allow
any third party applications to be installed or run on the device.
...Maybe one could talk to Garmin and suggest such an enhancement to
their range... Anyone have any influence with Garmin? ;-)