Nippon Cultural Broadcasting
The radio drama was jointly produced by Bandai, Kadokawa Shoten, and Nippon Cultural Broadcasting as part of the 40th anniversary of Nippon Cultural Broadcasting. It aired from April 12, 1992 to October 4, 1992, and was then released as "Sound Theater Gaia Gear" on five CDs from November 1992 to July 1993. Two soundtrack CDs were also released.