No problem, I just lurk the non-D&D forums, and you have a wonderful idea presented.
Lol, I know, I know, I meant the movie Dracula, not Vladimir Dracul. The stories about Vlad do give him some supernatural qualities and a vampire like him would create a much more interesting opponent than a cinema Dracula. I know he comes from the house Dracul. Tepes means 'The Impaler' in Romanian. I have to learn that people on the other side of the screen don't know the context I'm talking in.
I get the secret police thing, and you are already messing with history, so you could make the secret police only do the hunting and dealing with mystical things.
Just a suggestion, if GURPs doesn't work for your group after a few sessions, try playing this in Hunter: The Vigil (H:tV), Fate, or Savage Worlds (SavW). SavW has a good mechanic for Fear and is a Heroic game without being as shiny as D&D. Fate is very gritty if you need it to be, and compels are an amazing aspect (see what I did there?) of the game. H:tV is supposedly a horror game, but isn't, however it does make for an amazing hunt the monster game. You could change whatever H:tV's Mortality system around so that if they see gory and crazy things they have to roll for morality in addition to whenever they do something a little less nice.