That package/compilation was already released on PC in 2002 in CD format and now GOG released it in digital, so it can run on newer systems and Windows.
SH1 was only on PS1, there was no PC release after and before 2020, what you ask is that GOG release it as an emulated ps1 game on the PC. If that's the case, get the ps1 game for cheap and you can run it with Retroarch with HD tweaks.
GOG is not gonna remake the game from scratch, it will still be an emulated ps1 version.
But how is that date relevant? Why do you consider it impossible that Konami will (soon?) package SH1 with an emulator, like they did with Castlevania/Contra in 2002? I'm not saying that it's going to happen, I just don't get your argument on why it can't happen.
Nobody here asked for ports or remakes. Just the game, sold by GOG, playable on Windows (and maybe Linux/Mac).
It's about Sony and Konami rights to give the SH1 game disc image to GOG so they can release it on their digital platform.
SH2, SH3 and SH4 was on PC too, so they can do a "digital version" of them (as long as they don't remove the extra scenario with Maria in SH2)
This is the same scenario with Until Dawn, the game is a PS4 exclusive, Sony owns the rights about the game and IP, that's why there is no pc release (and people asked about it because Man of Medan is on PC too now)