The game (like many American movies) uses phone numbers starting with 555 which are invalid in the US. However in Germany numbers starting with 555 do exist.
Although all the in-game video sequences were shot in front of a blue screen and none of the actors actually went to Germany, the German game package still had a sticker on it, saying: "Exclusively filmed in Germany!" to attract more buyers.
The character Gabriel Knight ranked #2 in Computer Gaming World's November 1996 listing of the 15 most memorable game heroes.
In chapter two, the demonologist couple who visit the castle are a parody of Ed and Lorraine Warren, the famous demonologists who investigated the Amityville Horror case, the Conjuring case and A Haunting in Connecticut.