ISO 3166-2:GU
ISO 3166-2:GU is the entry for Guam in ISO 3166-2, part of the ISO 3166 standard published by the International Organization for Standardization, which defines codes for the names of the principal subdivisions of all countries coded in ISO 3166-1.
Currently no ISO 3166-2 codes are defined in the entry for Guam.
Guam, an outlying area of the United States, is officially assigned the ISO 3166-1 alpha-2 code. Moreover, it is also assigned the ISO 3166-2 code under the entry for the United States.