I had external GPS connected, when I switched over to internal. Once I saw that internal GPS was connecting I then removed the external GPS while the device was still powered on. I did some more configuring and rebooted the unit multiple times and Internal GPS always came back on. You got me thinkin...

+1 for confirmation from support. In other news, Ubiquiti GPS units from the Rockets M GPS series will work with this unit. I also attached a screenshot of my current GPS settings.

6.43rc64 fixed Internal GPS issue! Port settings are default and I switched from External to Internal and immediately picked up 4 satellites, in the middle of my house.