There are many places called Gloucester. You need to be more specific:
Australia
Gloucester, New South Wales, a town located in Gloucester Shire Gloucester River, a river located adjacent to the town of Gloucester, New South Wales.
Gloucester Tops, a monolithic plateau located adjacent to the Barrington Tops National Park, west of the town of Gloucester, New South Wales.
Canada
Gloucester, Ontario
Gloucester Township, Ontario
Gloucester County, New Brunswick
Acadie-Bathurst, New Brunswick (formerly Gloucester), a federal electoral district
England
Gloucester, the county town of Gloucestershire Gloucester Cathedral, a cathedral in Gloucester, England
Gloucester Road, London
United States
New Gloucester, Maine
Gloucester, Massachusetts
Gloucester (Natchez, Mississippi), listed on the NRHP in Adams County, Mississippi
Gloucester City, New Jersey Gloucester Point Grounds, the former baseball grounds for the Philadelphia Athletics
Gloucester County, New Jersey
Gloucester Township, New Jersey
Gloucester County, New York
Gloucester, North Carolina
Gloucester County, Virginia
Gloucester Courthouse, Virginia
Gloucester Point, Virginia