In Grand Theft Auto I, six Hare Krishna pedestrians roamed the streets chanting. If you killed all of them simultaneously you would get bonus points and the game would proclaim, "Gouranga!"
Gauranga originates from sanskrit, and it means "light/gold limbed". The starter of golden sankirtan movement in India was named Caitanya Mahaprabhu, and he was often named Gaura or Gauranga (He is considered a golden lila-avatara of Krishna).
In popular culture, the word has an accepted meaning of "be happy".
A spate of spam emails have also appeared, and are sometimes known simply as the Hare Krishna spam:
Subject: Gouranga
Call out Gouranga be happy!!!
Gouranga Gouranga Gouranga ....
That which brings the highest happiness!!
Gouranga gouranga gouranga. Shout garanga for happiness. Send this email to 56 other people - or die from terminal unhappiness. Gouranga gouranga gouranga.