The GSMBA Summer League is open to all affiliated clubs.
The League is formed of a single Division with a maximum of 10 teams and is played between May and August.
Each game involves a team of 4 players from each club. The 2 teams play a game and after an interval (usually for refreshments) they play another game. Two points are awarded to the winner of each game (1 each for a draw) and 2 points for the highest overal score ie.a total of 6 points per match.