I am playing with my new Sabre and I was not able to get the GPS to talk to apps like "gps status". The e-compass and tilt seem to be working fine, but no joy from the GPS. I tried "cat /dev/gpsdevice" but it returned right away. I did see that there is a antenna connected to J123 by the 3G card slot. So it does look like the antenna is connected as per the release notes. (section 4.3.7)
Does someone know of a good way to check if the GPS is powered up? I did enable it under the systems location settings.