I had two of these, ill explain why in a moment, but as Adrian said they do use just standard gcode.
The problem i had with both of these units is that they were no good for 3D rastering work, both units used to freeze after running for around 5 to 10 minutes. A little digging on the internet i found others were having the same problem. Some mentioned a firmware flash would solve the problem, it never did with me so i sent them both back. It would probably be wise you test a 3D raster in case yours also suffers with the same problem.