I'm trying to find this image elsewhere so I can have a proper size of it for download, but I can't find a source for the life of me and as far as I can tell gog doesn't give me access to the image beyond it being my profile's background. Does anyone know how or where I can get it?

Here is a larger version:
https://images.gog.com/35c928767e5f98364e0dd7fbb95dd504be7f41b2ea5d5606a1d07cec6bcc2642_prof_background_2560x650.jpg

I'm not sure if GOG has a bigger version somewhere, but that is what the profile links too I believe.

Hey, thanks, man! I hope they make it easier for you to use these backgrounds yourself in the future, I'd like that at least.

They probably don't because as you can see from the image size they don't make good background images. They only make it look like they are using a full image size.

If you want for instance GOG wallpapers, there are some out there on the net. For instance the GOG imgur account has a few at wallpapers sizes: https://imgur.com/user/GOGcom/submitted

That makes sense, though I hope that changes in the future. And thanks again for the link, these images are really charming.