This app was mentioned in 3 comments, with an average of 0.67 upvotes
If you have 2 phones (one for GearVR headset and other for virtual controller), try to download this app https://play.google.com/store/apps/details?id=com.kunkunsoft.gamepadforvr It's a virtual controller, help you control VR games via Bluetooth. Only 0.99$
How about a bluetooth gamepad https://play.google.com/store/apps/details?id=com.kunkunsoft.gamepadforvr
If you have 2 phones, this tool can help you control your VR phone via bluetooth
https://play.google.com/store/apps/details?id=com.kunkunsoft.gamepadforvr