Could you please tell me how to get from Gudauta to Gagra?
Minibuses will stop if you wave them down, if there are seats available.
At the bus stops, there is usually a schedule posted, but the Abkhaz don't follow it very closely)))
Ask the locals, they will help you. Otherwise, taxis at the stops might offer to take you, or you can team up with other vacationers to make it cheaper.
Minibus, taxi