I believe this is what you’re looking for
The original OGS was created by Graham (@topazg, still active here now) and Andrew (@Arathalion), who were software developers and Go beginners from England, I believe as a hobby software project. Back then it was correspondence only. After some years a French guy dmg become the main developer (and kind host to me for Bordeaux EGC!), but it got rather too much work for him so in 2013 it was merged with Nova.gs which was a real-time server built on a more modern tech stack.
Minor nit pick, nova was a correspondence server that could be played in real time