The European Gang was a gang that came from an unknown area in Europe that were planning to rob a bank in Vice City. Not much is known about the gang, but it is known that the gang was made out of six people, namely Nick Kong, Dick Tanner, Marcus Hammond, Franco Carter, Charlie Dilson and Mike Griffin, whom were all killed by Tommy Vercetti on Mr. Black's orders. After the death of all six members the gang most likely dissolved.
The names are all of characters in games that rival Rockstar's Grand Theft Auto. Nick Kong (Nick Kang, True Crime: Streets of LA), Dick Tanner (Tanner, Driver), Mike Griffin (Mace Griffin, Mace Griffin Bounty Hunter), and the other three (The Getaway). Rockstar often mocks their rivals in other easter eggs, such as True Grime Street Cleaners.