The Australian struck seven fours and four sixes at the top of the order to guide his side past Essex’s total of 153-8 with 19 balls to spare.
With the ball, Benny Howell returned impressive figures of 2-15 from his four overs, while there was a wicket apiece for Matt Taylor (1-14), Andrew Tye (1-31), Liam Norwell (1-43) and Kieran Noema-Barnett (1-20).
Gloucestershire take on Somerset tonight (Friday, 17th June) in front of a record crowd at the Brightside Ground, Bristol.
