The term 'Gate City of the West' refers to Omaha, Nebraska, a city located in the Midwestern United States. Omaha is known for its strategic location on the Missouri River, which has made it an important transportation hub since the 19th century. It is also home to several Fortune 500 companies and is a major center for the beef industry. Omaha is often referred to as the 'Gate City of the West' due to its role as a gateway to the American West.