will the G code generated be compatible with the DDCS V4.1 controller from China. I understand that it will not support direct control, movement of axis, jogging etc.
Depends on what firmware (circuit board software) it is running on that board. Without knowing that, we cannot answer, or even guess.
Welcome Paul, I am not personally familiar with this controller, but here is a list of the different G-Code firmware we currently support in MillMage. Interested to learn more, and if you find a flavor that works for this control system. We offer our MillMage 30-day free trial to assist with this consideration in mind. Please do let us know your results. 