In a medium bowl, combine minced garlic, garlic salt, black pepper, and Italian seasoning. Whisk together, then whisk in the olive oil.
Cut the ends off the zucchini and discard or compost. Slice zucchini lengthwise into long strips about 1/4-inch or thicker strips. You don’t want them too thin as they need to hold up to the grill.
Place sliced zucchini onto a baking sheet and brush with the oil and seasoning mixture. Turn over and brush the other side.
Place seasoned slices onto the hot grill. Allow to cook for 4-5 minutes then turn slices over. Cook an additional 2-3 minutes.