I realize the answer is probably "no", but let me put this to you as an opportunity.
I purchased Star Control Origins when the title was pulled from both steam and GOG. I did it because ive liked Stardock, since elemental, and I supported the games. I was provided with a steam key, and no option for a GOG key, or stardock download(very preferred!). I didn't know if i would like the game so i bought no DLC, and no season pass.
I loved the game, I beat it. I would be back for more, except : I only tolerate Steam, and would rather have GOG. I might even be persuaded to buy future DLC if i could get it on GOG. I hate how you need steam to play and how the game had various prereq issues with VC distributions. I would much rather play on GOG. Please... please open GOG connect! Let us who supported you when no one else would chose what platform to download on!
Again, I loved the game and would play future DLC, if not for the annoyance of steam. Now that im stuck on steam, i would have to buy future DLC or season passes on steam, which i refused to do.