The "download driver" link on the GMC website points to an iMon driver, so I guess it is an iMon display. There are 2 iMon drivers available in the ExternalDisplay plugin that is shipped with MP...
i check that, this is not a iMon display :9 not work with iMon plugin in MP
and not work with driver from GMC web site.
I found information about that case, and this is other version of avc-s1 - not nobeless byt ultra-media avc-s1.