Kudos to the Plex team for rolling this out. However a lot of us Galaxy S8 users actually got Gear VR headsets for FREE when purchasing our S8's. I also noticed that the S8 supports Daydream..but I will take a shot in the dark here and assume that if we had to choose between the two, that more S8 users own a Gear than a Daydream.
My point? Let's get this working on the Gear. The app runs fine up until you get to the Grant Permissions screen and then none of the Gear controllers work. Seems like it might be an easy fix? Just hoping you didn't put all your eggs in one basket with Daydream.