The rules of Gin Rummy (step-by-step instructions).If you’re ready to familiarize yourself with the rules of Gin Rummy, we’re here to help. Further, Gin Rummy is a two-player game, while in Rummy, multiple people can play at once. In Gin Rummy, instead of laying your melds (i.e., matching runs and sets) on the table during gameplay, you wait until the end of the game to reveal your hand. The rules are essentially the same as the rules of regular Rummy, but with twists. Gin Rummy is a popular card game that is a variation of Rummy.