Gokdos Gill is a being formed from the spirits of the past Zangyack Emperors and the final antagonist of the Gokaiger crossover episodes 28-29 of Doubutsu Sentai Zyuohger.
Gokdos Gill was at some point encountered by the Gokaigers on the Zangyack Homeworld. Gokdos defeated the Gokaigers and drove them off the planet.
Later, during the battle between the Gokaigers and Zyuohgers and Bangray's army of past Sentai enemies summoned out of GokaiSilver's memories, Bangray summoned Gokdos to defeat the Sentai. However, the summon was destroyed by the combined powers of the Gokaigers and Zyuohgers.