As much as I would love to see this on GOG, I worked on this Mod, its not a full game.
This is a Mod and I have hight doubts that the right holders would be very happy about this being on GOG.
That being said. If you are a Wing Commander Fan and haven't played it, give it a try. Its hard but its pretty cool.
Okay I am a bit biased in that regard but seriously give it a try and all the other Wing Commander Mods out there.