Fine to see gog not being left behind. I love that company for offering a lot of old and indie games and always DRM free. Just Linux versions were missing. This is definitely some good news.
But basically you could already extract the DOS game from the package and copy maybe the dosbox config for the game an apply it to your Linux dosbox.
It was a long, hard battle, but GOG has finally lost the will to resist and is now willing to make money.