Answer:
There is no specific legal tackle in Gaelic Football, unlike some other field games. A player can be hit shoulder to shoulder, which is the closest there is to a tackle. It is called "a shoulder" in the game. You cannot pull down a player or shoulder them from the front or behind, or push or trip them. Most of what you have to do is prevent them from playing the ball or rob them of possession, or intercept a pass or block a kick.