The gates are where Human Design's debt to the I Ching is most direct: the sixty-four hexagrams become sixty-four gates, keeping their number and their broad themes but recast into the language of the bodygraph. The atlas notes this derivation and treats the gates as part of a modern system. The gates group by the centre they sit on.
The atlas gives each gate its hexagram, its centre, and its keynote. The I Ching hexagrams the gates derive from, and the channels and centres they belong to, are treated in their own categories.