Fill a Collins glass with ice cubes and set aside.
Add gin, lime juice, guava nectar, and ginger syrup to a cocktail shaker.
Add 2-3 mint leaves to the shaker and gently muddle.
Fill the shaker with ice and shake for 10-12 seconds.
Strain the mixture into the prepared Collins glass.
Top with club soda and stir gently with a bar spoon.
Garnish with a lime wheel and fresh mint sprig.
Notes
The drink works best with fresh lime juice rather than bottled. Store-bought ginger syrup is fine, but homemade adds better flavor.Keep guava nectar refrigerated after opening. It stays fresh for about 7 days.For a non-alcoholic version, replace gin with extra guava nectar and club soda.The cocktail pairs well with spicy foods and tropical appetizers.