- GMA will be closed Memorial Day, Monday May 31st - GMA only enrolls new students into our school once a month. We are currently booked thru July. - GMA will be meeting new students for Intro Lessons on Saturday, September 4th. These new students will start their regular classes after Labor Day beginning on September 7th. If you or your child would like to start training in September, email or call 978-433-8772 to schedule an appointment.