Group Management Services, Inc. (GMS) is a Professional Employer Organization (PEO) that provides comprehensive HR solutions to companies of all sizes throughout the United States. GMS was founded in 1996 and is headquartered in Maumee, Ohio. The company offers a wide range of services, including payroll processing, benefits administration, risk management, and HR consulting. GMS serves a variety of industries, including healthcare, manufacturing, construction, and hospitality. The company has been recognized as one of the fastest-growing private companies in the United States by Inc. Magazine.