Government
Type: Constitutional monarchy with Westminster-style Parliament.
Independence: February 7, 1974.
Constitution: December 19, 1975.
Branches: Executive--governor general (appointed by and represents British monarch, head of state); prime minister (head of government, leader of majority party) and Cabinet direct an apolitical career civil service in the administration of the government. I--Parliament composed of 15 directly elected members in the House of Representatives and a 13-seat Senate appointed by the governor general on the advice of the majority party and opposition. Judicial--magistrate's courts, Eastern Caribbean Supreme Court (high court and court of appeals), final appeal to privy council in London.
Subdivisions: Six parishes and one dependency (Carriacou and Petit Martinique).
Major political parties: New National Party (NNP), incumbent; National Democratic Congress (NDC); Grenada United Labor Party (GULP).
Suffrage: Universal at 18.

Government of Grenada
Grenada is governed under a parliamentary system based on the British model; it has a governor general, a prime minister and a cabinet, and a bicameral Parliament with an elected House of Representatives and an appointed Senate.

Citizens enjoy a wide range of civil and political rights guaranteed by the constitution. Grenada's constitution provides citizens with the right to change their government peacefully. Citizens exercise this right through periodic, free, and fair elections held on the basis of universal suffrage.

Grenada's political parties range from the moderate TNP, NNP, and NDC to the left-of-center Maurice Bishop Patriotic Movement (MBPM -- organized by the pro-Bishop survivors of the October 1983 anti-Bishop coup) and the populist GULP of former Prime Minister Gairy.

Security in Grenada is maintained by the 650 members of the Royal Grenada Police Force (RGPF), which included an 80-member paramilitary special services unit (SSU) and a 30-member coast guard. The U.S. Army and the U.S. Coast Guard provide periodic training and material support for the SSU and the coast guard.
source: http://www.state.gov