ISO 3166-2:GM is the entry for the Gambia in ISO 3166-2, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), which defines codes for the names of the principal subdivisions (e.g., provinces or states) of all countries coded in ISO 3166-1.
Currently for the Gambia, ISO 3166-2 codes are defined for 1 city and 5 divisions. The city Banjul is the capital of the country and has special status equal to the divisions.
Each code consists of two parts, separated by a hyphen. The first part is GM, the ISO 3166-1 alpha-2 code of the Gambia. The second part is a letter. The code for Central River is from its former name, MacCarthy Island.