Hi, I think this is going to be a bit tricky. How will you test the controls? If you need specific controls for GO, you will need to download and install the GO SDK.
But, you should be able to load a gear VR build straight into GO, as I understand it. I havent tried though, as I dont have any Gear VR projects.
Here is another set of instructions:
https://headjack.io/tutorial/sideload-install-app-apk-oculus-go/After the APK is built, you will need to 'side load' it into the GO. This means by USB and android studio or some drivers. It does require the person with the GO to download drivers and use the command prompt (CMD) on windows. So if they have 0 technical skills, maybe you can help them via screen sharing/mirroring software such as teamshare.