I fully expected the GOG version of GK3 would have a pdf of the graphic novel that was included in every physical copy of the game. Without the comic's prologue it's hard to understand the opening movie or why Gabriel is standing in a hotel room in France. It's essentially part of the original game so I hope they update their version. Hope. *shrug*

For anyone interested, the graphic novel is freely available here:
http://www.sierrahelp.com/Games/GabrielKnight/GK3Help.html

Direct link to PDF:
http://www.sierrahelp.com/Documents/Misc/Gabriel_Knight_3_-_Graphic_Novel.pdf

How odd, I could swear it had been included in the past.