MacDonald Gymnasium opened in September 1999 and plays host to Endicott's varsity basketball and volleyball programs. The facility was dedicated in 2003 in the name of Dr. George MacDonald. The plaque outside the gymnasium is inscribed:
In appreciation to Dr. George MacDonald who has supported and nurtured the students of Endicott. As an avid believer in athletics, intramurals, and academic programs, he has gained our appreciation and admiration.
Throughout George MacDonald, MD's career as an outstanding surgeon, he always found time to help support the youth of the North Shore and Endicott.
We dedicate this gymnasium in his honor.
MacDonald Gymnasium, with a capacity of 1,200 spectators, is the perfect place to watch the Endicott men's and women's basketball and men's and women's volleyball teams compete. There are two sideline basketball hoops on each side of the gymnasium to accommodate intramural and recreation play. The walls of MacDonald Gymnasium are adorned with banners detailing the numerous conference championships, NCAA appearances, ECAC championships, and 1,000 point scorers. The gymnasium is equipped with a state-of-the-art sound system, two scoreboards, and on dates of competition, a scorers table that can seat up to 10 staffers.