I don't know of anyone using the galil controller.
this is some of the current supported hardware.
http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?EMC2_Supported_Hardware
Emc2 is really designed to use minimal hardware to make a motion system. It has its own software motion controller within it. For a decent setup - a card is needed to count encoders and output servo values (and servo amps). With emc2's HAL (hardware abstration layer) you can setup many system (pid servo loops and such)
systems that move motion outside the pc are not really a good match for emc2.
sam