Installed the ADB driver and put the Go into developer mode.
Installed Android Codeworks from UE_4.19\Engine\Extras\AndroidWorks\Win64 and restarted
Verified that the Go appears as expected when calling adb devices from the command line.
Generated a signature file by following the directions here (https://dashboard.oculus.com/tools/osig-generator/) and placed it in UE_4.19\Engine\Build\Android\Java\assets
Set up a test project following the directions here: https://docs.unrealengine.com/en-US/Platforms/GearVR/QuickStart
The Go appears in Unreal Editor's Device Manager, but isn't present in my Launch menu. What additional thing do I need to do or change?
Also make sure you disable all VR related plugins _except_ Oculus VR.
That appears to have been the issue. Steam VR plugin was still enabled alongside the Oculus VR plugin. The device now appears in the launch list after I disabled SteamVR.
ADB driver has been having error while I tried to install it .. I get the error "The INF file you selected does not support this method of installation"