I have finally finished my masterlist server application, written in gdscript. It's based on dpmaster application but due to Godot's limitations with high-level multiplayer API, the original dpmaster masterlist server cant be used because it has to communicate on the same port that the game is hosted on, and with Godot its not possible to send/receive information on port that game is hosted on.
Thus i added "port" property, so now you can specify game port that will be served to players/clients.
Source and binaries:
https://github.com/kuligs2/gdmaster