Pdanet tablet works on gear using foxfi in my S4, non rooted.
Bluetooth tether does, not because my S4 (fido) has it deactivated....
So I can connect to internet and browse if I want (but why ? it's too small) using pdanet.
Unfortunately you can not use google stuff that require internet connection since they will only work with a native bluetooth tether.
The only reason I would need internet is to use google but since I can't I rarely use pdanet, but it does work if that is what you want.
Only option would be to flash my S4 with another ROM that enables BT but for my needs, I find that too much work. I am good with all I can do with the gear for now.