The aim of each player is to form melds, either as sets or runs and minimize deadwood cards in their hands. The game's objective is to be the first person to reach 100 points.
If all you're looking for is to refresh your memory, look no further. The page even contains an interactive tutorial that'll teach you the rules while playing the game.
If you're new to the game, we suggest you head over there to get acquainted with the rules. We've created a page explaining how to play Gin Rummy in detail.