Meet Dr. Mapes Photo: Dr. Gary Mapes - Dentist in Longview TX Dr. Gary Mapes has been practicing general dentistry in Longview since 1984. He is a 1983 graduate of the University of Texas Health Science Center at Houston, Dental Branch. He earned his Bachelor of Science degree from West Texas State University. His office staff is well trained, friendly, and take a genuine interest in patient comfort and quality of life. They take the time to get to know their patients, understand their needs, explain treatment options, and answer questions in a professional, responsible and caring way.