Try Lutris - it integrates with the GOG store so will fetch and install the games from there, with proper scripts to configure Wine so that the game just works with no extra configuration (i.e. with works like the Steam launcher does for the Steam store).
I believe Heroic Launcher does the same, but I’ve just settled down to use Lutris and Steam so never go around to test Heroic.
I got GOG Galaxy working in Steam, through Proton, as an “Add a non-Steam Game”. I’ll have to try Heroic Launcher.
Try Lutris - it integrates with the GOG store so will fetch and install the games from there, with proper scripts to configure Wine so that the game just works with no extra configuration (i.e. with works like the Steam launcher does for the Steam store).
I believe Heroic Launcher does the same, but I’ve just settled down to use Lutris and Steam so never go around to test Heroic.
You can Download an .AppImage from their Website directly. Just make it executable and there you Go. Decent UI and pretty straight forward