Not sure if there is an option for this already, but I think you should have an email or some kind of scheduled release whenever and older game is freshly released by GOG. I tend to not buy as many new games on here as I would on Steam, but when an older title is released, I'm always interested in at least checking it out here, knowing the chances of it running on a modern system are much higher than anywhere else with a GOG purchase.

If you have opted for the newsletter, you probably do get a notification for most if not all of them.