I have several games in my GOG library, including this one, that have released native Linux versions, but are not made available from GOG. I do wish they would get the Linux versions of them. I think its great that they have started creating wine installers for some games that run well on wine, but they really should focus first on releasing the Linux versions of games that already have native Linux releases available.
GOG is my preferred source for games, and Linux is my preferred platform for gaming. But when I purchase a game, and other sources have a native Linux version available and GOG does not, I generally buy them elsewhere (obviously not always, but usually), though I would much rather purchase it from GOG. That is something GOG should consider.
I definitely understand this. I have a hard time grasping why there is not a push for parity between versions of the game in these cases. Then again, buying from GOG nowadays seems like a riskier proposition for new games due to this issue and other issues lik games not being provided a patch whereas they are provided one on Steam, missing DLC content, and/or other features of the game.
I really hope that this gets taken care of as it makes it hard to justify purchases at GOG if we are being given lesser versions of games (or in your case, no version).
For the games I have in my library, GOG is usually very good about patches, at least in my experiences with the 100 or so games I have here. On Linux, they have to be manually checked and patched though, because Galaxy is not yet available for Linux. I dont personally mind about that all that much. Though they also claim they are planning to release Galaxy on Linux eventually as well, so that should only be a temporary issue anyhow.
Beyond that though, I have not had any issues personally regarding patches, and in fact I do have a few games on GOG that run a lot better than the Steam versions, because they have received compatibility modifications that the Steam version does not have and/or have defective or outdated DRM being removed from the GOG version, which is a nice bonus. One example, if you take a look at the game "Two Worlds" on both Steam and GOG. The reviews are night and day, because the Steam version has outdated and defective DRM that causes a lot of issues, which is removed from the GOG version and runs very well. I have at least one older game as well in my GOG library, that the Steam version of it does not run on newer versions of Windows (and has a lot of angry Steam reviews as a result), while the GOG version has received compatibility fixes and runs great.
Those are just some of the many reasons I prefer getting games from GOG when I have the option. GOG usually gives a lot of love to the Windows versions of games, but their Linux games are still catching up. That will probably always be the case, to some degree, but I do still hope they continue improving their Linux support. Which so far they have been, its just been a bit slower than I would like it to be lol. I just do not quite understand why they don't have more games on Linux, which already have native Linux versions released elsewhere. Seems like low hanging fruit to me, especially when they already have they already have the Windows and Mac versions in their store anyway.