Gate Cards are special cards used in the game Bakugan, which is a popular toy and animated series. Each card has unique abilities and effects that can influence the outcome of battles between Bakugan figures. Players place their Gate Cards on the battlefield to activate these effects during gameplay. In Bakugan, players roll their Bakugan onto the Gate Cards to see if they can land on them. If successful, the Bakugan gains bonuses or special powers based on the card's attributes. This adds a strategic element to the game, as players must choose their Gate Cards wisely to enhance their chances of winning.