Late Export for You: The Far Beyond the VoyageOVAs began streaming exclusively on Crunchyroll in North and South America, Australasia and South Africa on January 15, 2020, five years after the second episode was released in Japan.
Science Marches On: When Chamber brings up a planetary map of the solar system, it also includes Pluto, which is classified as a Dwarf Planet today and not a planet proper. The same holds true when, in the files Ledo look at in Episode 9, a newscaster shows a planetary map that includes Pluto and Halley's Comet alongside the regular planets.
What Could Have Been: There were plans for an anime sequel but due to "various circumstances", it was scrapped and the sequel became an upcoming Light Novel.
Various Trivia
Super Robot Wars: The series made its first appearance in in the Super Robot Wars Z 3: Tengoku-hen. Incidentally, not only did the staff of Gargantia apparently want it to appear in the series, but the staff of SRW were planning on including it even before it finished airing.