Muddle the orange sections in the bottom of a large cocktail shaker. Add ice, gin, lemon juice and simple syrup. Shake vigorously to combine. Strain into pitcher and store on ice before serving.
To Serve:
Pour 4 ½ ounces of gin- juice mixture into a low ball glass filled with ice. Top with club soda and stir to combine. Garnish with orange wedge and serve.