Guinea is a republic. The president is directly elected by the people and is the head of state and the head of government. The unicameral National Assembly is the legislative body of the country, and its members are directly elected by the people. The judicial branch is headed by the Supreme Court of Guinea, the highest and final court of appeal in the country.

Guinea is a member of many international organizations, including the African Union, Agency for the French-Speaking Community, African Development Bank, Economic Community of West African States, World Bank, Islamic Development Bank, IMF, and the United Nations.
https://en.wikipedia.org/wiki/Guinea