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GAA solo, also known as Gaelic football solo, is a technique used in Gaelic football to maintain possession of the ball while running.
The rules on GAA solo are as follows:

• The ball must not touch the ground more than twice in a row while being soloed (double hop)
• The player must not throw or hand-pass the ball to themselves while soloing.

It is important to note that these rules may vary slightly depending on the specific competition or organization, so it is always best to check the official rules before playing or refereeing a Gaelic football game.