GMG Janitorial is a San Francisco-based janitorial company that offers customized cleaning services for various commercial clients such as hotels, schools, medical facilities, and government buildings. The company prides itself on quality control through regular client visits and highly trained employees. GMG also provides modern communication tools and promises a timely response to any client concerns. With over 20 years in business, GMG Janitorial now cleans over a million square feet for many satisfied customers.