Gin Rummy is probably the best-known Rummy game. It is a two-player game that reached its peak of popularity during World War II, when it became a national. According to Hoyle's Rules of Games, Gin Rummy was invented in the early s by Elwood T. Baker of New York. Here are the complete. Learn how to score in gin rummy from an expert card player in this free instructional video. Expert: Gary Zier.