Heat oil in a large deep saucepan to 375 F. Drain pickles and pat dry with paper towels.
In a shallow dish, whisk together egg and milk. In another shallow dish, whisk together flour, cornmeal, salt, pepper and garlic powder.
Coat pickle slices first in milk mixture, than fully coat them into the cornmeal mixture.
Fry pickles in batches until golden browned. Drain on a paper towel lined plate.