All 51 episodes of the series is now streaming in the website. Gaia is the 7th Ultraman series that is legally available in the site. Other Ultraman shows that is still streaming on the site are: Leo, 80, Nexus, Max, Mebius, and X.
If you are living in the United States, Canada, Latin America, UK, Australia, New Zealand or know how to use web proxies, please support the official release.
[Source: The Good, the Bad, and the Godzilla]