Slice zucchini into ¼-inch thick rounds. Place in a colander, sprinkle with 1 teaspoon salt, and toss to coat. Let sit for 15-20 minutes to draw out moisture.
Rinse zucchini briefly with cold water to remove excess salt. Pat thoroughly dry with paper towels.
Set up three shallow bowls for breading: In the first, combine flour, garlic powder, ¼ teaspoon salt, paprika, and black pepper. In the second, whisk together eggs and milk. In the third, mix panko breadcrumbs, Parmesan, and Italian seasoning.
Working with a few pieces at a time, dredge zucchini in the flour mixture, then dip in egg mixture, and finally coat thoroughly in breadcrumb mixture, pressing gently to adhere.
Heat ½ inch of oil in a large skillet over medium-high heat to 350-375°F.
Working in small batches, fry zucchini for 2-3 minutes per side until golden brown and crispy.
Transfer to a paper towel-lined plate to drain excess oil.
Serve immediately while hot and crispy.