General Microsystems has built a reputation of quality, flexibility and excellent customer support in the queue management business. The company’s complete queue management solutions don’t just take the hassle out of queuing: they also act as powerful enterprise logistics tools. Because at GMS, we push queue management to its full potential. General Microsystems (GMS) Queue Management System (QMS) Products: QMSi Series (QMS210i, QMS250i, QMS300i) , DGcaller Series (DG10, DG20, DG100), QTag. ISO 9001 REG No.: 601170