To arrive here at the same time or at least soon after it is released on Steam?

I want to get this game, a lot.

What do you guys think?
Obviously you will have to guess.

Depends on how well this Horizon game did here, which I guess would be along the lines of "reasonably well"(?) (considering that it was in the frontpage top-ten for quite a while when it was released/on sale afterwards).

I'd say there's a good chance, but you'll likely have to be VERY patient.

Horizon Zero Dawn arrived on GOG after Steam release so it could be the same for Days Gone too. I'm not 100% sure but I also can't say that it wouldn't come on GOG.

Horizon Zero Dawn hit Steam and Epic in August, and came to GOG by nearly the end of November, so expect to wait about 4 months also for Days Gone. That should put the GOG release some time in August or September of this year. I don't see why Sony would bring Horizon Zero Dawn here but not Days Gone, but we'll just have to pay the DRM-free tax of waiting.

Yeah, I am hoping too that they will bring it here.
Though I wish if they do to do it at the same time as Steam.
Because, why not?