2GIG Go!Control, GC2, and GC2e firmware can be updated by the 2GIG USB Firmware Update Cable or via an Over the Air Update (OTA) if connected to service.
Note: The GC2e uses panel specific firmware, so keep that in mind.
You can find steps on how to update the firmware, along with patch notes, in the below guide. Subscribing to the thread will allow you to be notified when new firmware inforamtion is added: