OK I have beat up on MAch4 for most of the Gcode stuff that I can without being able to MOVE the machine.
I could suggest a read of a Fanuc and HAAS Gcode manual
AND it is what it is AND what it does have does work well so far (;-) and should be very familar with most folks.
Just remember MACH3 it is NOT in many ways. RTFM
IS there anything NEW ready yet ??
(;-) TP