Sooo, the main game already has a page in the gog store, when will the Alone in the Dark Prologue arrive on gog?

Best to assume it never will arrive. We're considered second class citizens to publishers.

Oh, I was hoping to see it here

So was I.

I'd love to see that prologue inserted into the main game ultimately, since it's a cute little introduction even if it's way shorter than even "Jack in the Dark" was back in the day, but yeah, GOG has no reason not to help sell more copies of this by making the demo available.