Hi,
Linux users can use an open source replacement to GOG windows client, the project it's called minigalaxy. On the github page of the project https://github.com/sharkwouter... minigalaxy is avalible as a deb package or rpm or it can be compiled using python3. Minigalaxy does is job it's not feature complete, it lacks the web store browser, but manages the game library very well, it manages the game's setup process just fine and allows to run them directly through wine, I proposed on the github page of the process to add the feature to select which wrapper to use, adding the possibility to use proton and crossover as vanilla wine alternatives. For now just execute the game exe in its installation folder with crossover to use it.