You'll need a 3d cam program like Meshcam to convert 3d models in to gcode, and it'll have to be a 3d model not 2d drawings.
Alibra design express is a free very easy to use program, and very powerfull.
It has some good tutorials with it as well.
Meshcam only has simple 4th axis control though so you may need to find a program that can handle rotating 4th axis gcode but you may find that meshcam can handle what you want to do.
Ok just re read your post, it looks like your wanting to mill out a something that looks like a spoked wheel, this can be done in Meshcam, you'll need to make a 3d model and use 2 sided machining.
Also I think you'll have to get a good bit of practice in designing in 3d before attempting to make a spoked wheel, you will be able to do it, it's just the way to go about it that'll take practice.
If I was doing it I think I'd create the rim and hub first using a revolved profile and then add 1 spoke and array it, then mirror the array and do the spokes going the other way in the same way.
I've never done it though so it'll most likely be a lot harder than it sounds
![Grin ;D](https://www.machsupport.com/forum/Smileys/default/grin.gif)
Steve