On the one hand this game can be downloaded for free from the game's website.
On the other hand, it's also on Itch and Steam, so it would make sense to have it on GOG too.
If nothing else, it might help it get discovered more often.
I can't remember how I stumbled upon this game, but being free and open source I gave it a go and it was quite fun, despite the genre (2D turn-based strategy/tactical RPG) not being quite to my tastes.