Gallop Racer 2003 (known as "Gallop Racer 6: Revolution" in Japan) is an update of it's previous incarnations with the standard modes (exhibition and season mode) and has six different jockeys to choose for the players character in the season mode as well as 32 different tracks and over 3000 different horses.

Players can breed horses using a series of mini-games, the outcome, either good or bad, will determine the type of horse, the better the player is at the mini-games, the more powerful the breed will be. Also the player can bet on races in the season mode, using the proceeds to buy better facilities to train their stable. It also features an extensive training program for new players to the Gallop series.