I've been trying to get a hold of the GPL source code for all the firmware images that Bitmain has posted on their support site https://bitmaintech.com/support.htm . 

Would anyone here know where I might be able to find that?

I've been emailing Bitmain but they seem to be confused about what I'm asking for.

I'm not asking for just the cgminer source code I'm asking for the development environment thats used to compile the complete firmware images that Bitmain provides for download.