As the Oculus store is officially dead, it may be a bit harder to come by Gear VR apps and games. This website (the gearvr.net vault) aims to provide an archive of many Gear VR apps.
Theres also the infamous russian torrent with a bunch of GearVR apps. Here it is, encoded in Base64: bWFnbmV0Oj94dD11cm46YnRpaDo1NEI1REY1ODg5RjI3NDc0MzFBRjk2QzVFNTI2NTM4NDM2OUIwQjU5JnRyPWh0dAo=