GMC is the abbreviation of gantry machining center，when  C type vetical machining center Y axis upto 900mm,it makes the spindle centerline to column distance too big，and would decrease the rigidity of the machine ,so Y axis upto 1000mm would use gantry type to instead of C type vmc.

Besides,the worktable would be 100% support by the machine body in full travel which increase the max workpiece load capacity ,double column gate width from 1000mm to 4000mm,worktable length from 2m to 10m.