I mean, it is fall....
For the simple syrup: In a saucepan, combine all ingredients and stir over medium heat until the sugar dissolves. On low heat, continue to summer for 10 minutes, whisking occassionally. Remove from heat and allow to cool.
For the cocktail: Combine the ginger beer, pumpkin spice syrup and vodka in a shaker. Shake well and pour over ice. Garnish with a cinnamon stick.