Global Adventure Trekking. GAT is environmentally-conscious outdoor adventure tour operator based in Kathmandu, Nepal. We are leading adventure travel companies privately owned and managed by a group of experienced travel professional since 1998. It is officially registered with the Ministry of Tourism, the government of Nepal and affiliated with many different organizations- Nepal Tourism Board (NTB), Trekking Agencies Association of Nepal (TAAN), Nepal Mountaineering Association (NMA) and Kathmandu Environmental Education Project (KEEP).