Inhouse package is testing purpose. The app can be installed and launched on your local developer mode enabled Oculus Go or Samsung Galaxy.
Use ADB (For Advanced User)
For the GearVR, you can install app via adb or QR code and then launch app by tapping icon.
For the Oculus Go. you can install app via adb and launch app via Navigate > Library > Unknown Sources.
Use Direct Publishing (For Newbie User)
See Following "Publishing to Oculus Dashboard Directly" https://help.instavr.co/hc/en-us/articles/360004384114
App packaged with Inhouse cannot be published via Oculus Store (Store reject the package).
Oculus Store :
Oculus Store package can be submitted to Oculus Store but cannot be launched local devices.
App ID for Oculus Store (GearVR) must be filled before submission. If not, Oculus Store reject your app.