The GMS countries are Cambodia, the People's Republic of China (PRC, specifically Yunnan Province and Guangxi Zhuang Autonomous Region), Lao People's Democratic Republic (Lao PDR), Myanmar, Thailand, and Viet Nam.
In 1992, with assistance from ADB, the six countries entered into a program of subregional economic cooperation, designed to enhance economic relations among the countries.
With support from ADB and other donors, the GMS Program helps the implementation of high priority subregional projects in transport, energy, telecommunications, environment, human resource development, tourism, trade, private sector investment, and agriculture.