Italian Grape Ale is under 'local styles' as X3 with a suggested placement under 'category 29 - Fruit beer' for competition purposes. You can find the full BJCP description of the style at https://www.bjcp.org/docs/2015_Guidelines_Beer.pdf. As it is not an official style for judging but added for regional competitions, it is not found in the 2015 guidelines. You can always enter it into your copy of BeerSmith in the style profiles.
