I have just watched Eastern promises. Perfect movie, now I know where Gvardia is inspired off. 
Actually it wasn't. Don't let our avatars and the similiarity fool you, except for a bit of a russian touch in Gvardia, there's no connections or inspiration, neither our Family story, organisation, or anything, we're not even a Russian Mafia.
I've watched the movie in 2011, Eugene Tony and the rest after that, since I recommended them to watch it.