@fortuitusI'm curious as to why the source code of these unreleased ports aren't available on Github or equivalent?
Join the IRC channel. Descent 2 is one of the games on GCW Zero that support networked multiplayer. We occassionally have deathmatch battles with the IRC community and it's a nice excuse to try out the wi-fi capabilities of the Zero
Precisely because they are unreleased. Releasing means conforming to the code license. AFAIK all the Johnny's ports that ever had publicly available binaries have their source code released. If you don't see them on Johnny's github, it most likely means the GCW Zero port related code is integrated in the mainline (which is ie. the case for his Odamex port).
Also, you mentioned the official GCW Zero github repo - that is reserved mostly for the core software of the project. The game ports, etc. will be found on the github accounts of the people responsible for the port. Also, please note that none of us contributing to the software part of GCW Zero is hired or otherwise legally connected to GCW LLC, so that's another reason to keep the code on our private accounts.
If you have a binary of a port that has no source code release - please contact me, as this is violating the program's license.