God-Emperor is the title associated with Leto Atreides II after he ascended to the throne of the Atreides Empire. The title reflects both his status as ruler of multiple galaxies, and the formidable prescience powers he acquired after his transformation to a human-sandworm hybrid.
This title is incorporated into the name of the novel God Emperor of Dune without the hyphen.
Behind the Scenes Edit
In India, God Emperor or "Chakravartin" is a title of a mystical figure which is said to cross the boundaries of several castes, and is therefore able to change the course of history/time. (Chakravartin means "the man who turns the wheel of destiny".)