One of my favorite pizza spots in Dallas is Greenville Avenue Pizza Company, otherwise known as GAPCO. GAPCO is known throughout Dallas for their delicious, and giant pizzas. You can order pizza by the slice as well as a full size pizza. GAPCO is a trendy pizza spot for all your greasy needs. My favorite pizza to order is the Five Cheese pizza, which is pictured below. Go ahead and check it out!