Nope. I can't see any reason for GOG to do that. It would be just a cost for GOG and no gain.
The OP asked for CDP games. With them it could make sense, EA is doing the same. And they are doing it for The Witchers.
In general, just for clarification, buying a GOG game gets you into a bundle of contracts. Most prominently you buy the license for the game. (That means, e.g. if you own one of the recently republished D&D games, you also own the license to the GOG version, as those are the same.)
But for many people (like myself), even more important is the fact that you also close a service contract about storing, providing and supporting each game you bought here. Steam calls this their "subscription service, eg.
Therefore there is legally no leverage to get a GOG version of an already owned license, as it is a whole different contract.