Gus \gus\ as a girl's name (also used as boy's name Gus), is a variant of Augusta (Latin), and the meaning of Gus is "great, magnificent".

The baby name Gus sounds like Cas and Kas. Other similar baby names are Gal, Gusta, Dusa, Lusa, Gay, Gai, Gae, Jas, Luz, Nis, Ros, Susy, Susi, Suse and Sue.