Urban and Gill announced the concert Monday. It will be held Oct. 13 at Nashville's Sommet Center.
Jason Aldean and Lady Antebellum are also scheduled to perform, with more acts expected to be announced.
Tickets are only $25 and go on sale Wednesday.
The all-star show is part of the museum's "All for the Hall" fundraising initiative created and led by Gill since 2005.
The concert will open with a one-hour set by Urban and his band. Then, Gill will join Urban and an all-star band to bring out special guests.