Why would this be a "surprise"? It's in the game. Anyone who's played the original GTA doubtless has fond memories of GOURANGA!, which is to say, running over an entire line of schoolchildren out on a field trip. You get a hefty point bonus for it.
I think you'll find that the Gouranga bonus was for driving over a line of Hare Krishnas.. hence the word "Gouranga", which is a popular Hare Krishna chant