The Ga West Municipal Assembly was carved out of the erstwhile Ga municipal which was created in 1988 in pursuance of the government decentralization and local government reform policy. In 2004, the Ga Municipality was divided into two with Amasaman capital remaining the capital for the newly created Ga West Municipal. The Municipality forms part of sixteen (16) Metropolis, Municipalities and Districts in the Greater Accra Region. the Municipality lies within latitude 5°35° North, 5°29’ North and longitude 0°10’ West and 0°24’ West. It shares common boundaries with Ga East and Accra Metropolitan Assembly to the East, Akwapem South to the North and Ga South and Ga Central to the South. It occupies a land area of approximately 284.08 sq km with about 412 communities.
As part of efforts to mitigate problems usually brought about by the rains, the Ga West Municipal Assembly in the Greater Accra Region is constructing a major underground storm drain on the Amasaman stadium road which links the main Accra-Nsawam road to towns within the area.
Good news for schools within the Ga West municipality, since very soon they would be operating without blackboards which is said to be hazardous and dangerous to the health of the teachers and school children.