G-ZERO now works with other CAM systems like Surfcam and Mastercam. If you are milling a complex surface, then use one of these complex programs to produce the cutter path (export path to a CL or APT file), then use G-ZERO's superior posts to make good G-code.
Example:
MAT'L
TOOL
DRILL
POINT
POINT
TOOL
MILL
#FILENAME.CL