GMS is a Schaumburg-based agency that serves businesses in the metro. It helps clients boost their productivity and connect with their customers by providing mobile application development services. Its developers build apps for a variety of platforms, including Android, iOS, and cross-platform. They also offer application modernization, website development, Cloud computing, and managed IT services. GMS brings over more than 25 years of experience in the industry. TimeMH and Antenna Portal are some of the applications developed by the company.