Pat pickles dry. In a dish, mix breadcrumbs and olive oil. Microwave for 1-2 minutes until golden brown, stirring every 30 seconds.
In a bowl, mix egg, flour, garlic salt, and cayenne pepper. Dip each pickle into the egg mixture, shake off any excess, then coat in breadcrumbs.
Spray the air fryer basket with oil spray and place the pickles in the basket. Cook at 400℉ for 8-10 minutes, flipping halfway, until they are golden brown.