GM Boo is a short period( ~ 0. 36 days) contact binary system discovered for over 10 years. In this work,new multi-color photometric light curves from 2010 to 2015 and low-resolution spectra of GM Boo are obtained. We extracted 19 new eclipse timings of GM Boo from the light curves,deriving a long-term increasing rate of the orbital period d P/dt = 1. 06 × 10~(-7) d ·y r~(-1) combined with historical data. Photometric solution is derived with the Wilson-Devinney Code,which shows that GM Boo is a typical W-t...