It is a local private service contractor duly licensed and registered under the laws of the Republic of the Philippines. It is duly licensed by the Department of Labor and Employment (DOLE) and is a wholly owned subsidiary of Gulf Asia International Corporation (GAIC), a licensed overseas employment agency since 1984. GAIC, in turn is a subsidiary of EEI Corporation (EEI), one of the leading construction companies in the Philippines.

GAMSI provides janitorial, messengerial, carpet/upholstery cleaning, ground maintenance / gardening, building maintenance and general cleaning services.