Preheat George Foreman grill while you prepare the zucchini for cooking.

In a large bowl, combine the zucchini, olive oil, garlic powder, salt, and pepper. Toss until the zucchini slices are evenly coated with oil and seasoning.

Place the zucchini in a single layer on the grill and close the lid.

Cook for five minutes, until the slices are cooked through