About Gwynedd Family Medicine. Gwynedd Family Medicine is a group practice with 1 location. Currently, Gwynedd Family Medicine specializes in Family Medicine with 4 physicians. Gwynedd Family Medicine Office Locations. Gwynedd Family Medicine. 1600 Horizon Dr Ste 117 Chalfont, PA 18914. Monday : 8:00 AM - 8:00 PM:.