It houses 12,000 sq ft (1,100 m2) of gallery space, featuring traditional and modern exhibits. Collections of artifacts and family histories contribute to exhibits showcasing the pioneering and philanthropic spirit behind the development of Atlanta. Other exhibits include a recreation of the 1928 Rhodes-Robinson House foyer located on West Paces Ferry Road and a recreation of Thomas K. Glenn's office. Mr. Glenn, the late chairman of Trust Company bank, in the 1930s ran Atlantic Steel, previous owner of the land that is now Atlantic Station. Glenn's family is among the project's supporters.
The Millennium Gate has been greeted with puzzlement regarding its purpose, and it has been criticized for its lack of historic significance and for being a plain imitation of similar designs in Rome, Paris and Munich rather than independent art. Because of its proximity to the IKEA furniture store, some observers have given it the nickname "Arc d’Ikea."
The Gate's exhibits are open to the public. The rooftop penthouse, Foyer gallery, and Oval Lawn are available for weddings, conferences, and other events by booking only. The Millennium Gate also serves as a museum, but is only open to the public by appointment.