In football, GD stands for goal difference, which is the difference between the number of goals a team has scored and the number of goals they have conceded during a season or tournament. It is a tiebreaker used to separate teams that have finished equal on points in league tables. For example, if two teams have the same number of points, the team with the superior GD will be ranked higher. GD is calculated by subtracting the number of goals a team has conceded during the season from the number of goals they have scored. It is a useful metric for betting on outright markets like league winners or relegation, as it can ultimately determine the fate of bets. Knowing the GD can help make more informed bets, as it can be the tiebreaker that determines the outcome of these markets.