Ultraman Gaia takes place in yet another universe, one that is totally different from the world of the Shōwa era Ultramen (Ultraman to Ultraman 80), as well as the world of Ultraman Tiga and Ultraman Dyna.
Ultraman Gaia terjadi di alam semesta belum yang lain, salah satu yang benar-benar berbeda dari dunia yang Shōwa era Ultramen ( Ultraman ke Ultraman 80 ) , serta dunia Ultraman Tiga dan Ultraman Dyna .