Combine breadcrumbs, cheese, and parsley in a shallow dish; set aside.
Peel shrimp, leaving tails intact, and devein, if desired. Place in a large bowl. Sprinkle shrimp with garlic, seasoned salt, and pepper. Drizzle with olive oil; toss gently.
Dredge each shrimp in breadcrumb mixture. Arrange shrimp in an even layer in 2 greased 15- x 10-inch jellyroll pans.
Bake at 400° for 15 to 20 minutes, stirring twice.