I heard back from Cisco and the problem is resolved. Please see below:
It has been reported that over the weekend, there was an issue with device/network visibility that impacted a large number of GO networks. The development team was engaged by Sunday evening, and a fix was rolled out overnight.
In case you still cannot see your hardware under your account, please try refreshing and logging back into the GO App. And please let me know if you still are unable to see the hardware.