What myths are associated with chaos the greek god?

Well, for one, Chaos is a Greek Goddess.

The ancient meaning of Chaos is "Gap" or "Chasm", she is one of many air gods - the dome of starry Ouranus (Heaven), then Aither (Bright Upper Air), then Chaos, then dark Erebus who was the mist which touched under the earth under and at the edges.

Chaos is also associated with primordial "mix" from which all the primal gods and goddesses sprang. She is mother of Nyx (Night) and Erebus (Dark), who gave rise to Aether (Light Air) and Hemera (Day) - who in turn bore Gaea (Earth), Ouranus (Heaven), and Thalassa (Sea).

Chaos does not have a mythical presence save in the beginnings of origin.