Hours and Locations: Medical services. (Open to the public. Call to make an appointment) • Paris Gibson Education Center 2400 Central Ave, Great Falls, MT 59401. Monday - Thursday 7:30 am to 4:00 pm. • Longfellow Elementary 1101 7th Ave S, Great Falls, MT 59405. Monday- Thursday 7 am to 6 pm Friday 7:30 am to 4:00 pm..