Is there a bus from Gudauty to Tkuarchal?
In Gudauta, there's a bus station, you need to find out there, and where are you now? Or should I catch a minibus from the road?
Buses, I don't know. There are minivans that run from the border to Tkuarchal. Or to Sukhum and try to find something there.
You can take a minibus from Gudauta to Sukhum, and from there to Tkvarcheli
There is a bus from the border.