It alternated in power with the Grenada United Labour Party (GULP).
[1] The party was founded in 1955 and took its support from the urban middle class and landowners.
[2] It first contested national elections in 1957 when it won two of the eight seats, tied with the GULP and the People's Democratic Movement.
Although GULP convincingly won the next elections in 1961, taking eight of the ten seats, early elections were held in 1962, in which the GNP won six of the 10 seats to return to power.
[3] In 1984 it merged with the National Democratic Party and the Grenada Democratic Movement to form the New National Party, with Blaize as its leader.