The meaning of Gaius in the Bible
(From Easton's Bible Dictionary)

A Macedonian, Paul's fellow-traveller, and his host at Corinth when he wrote his Epistle to the (Romans 16:23). He with his household were baptized by Paul (I Corinthians 1:14). During a heathen outbreak against Paul at Ephesus the mob seized Gaius and Aristarchus because they could not find Paul, and rushed with them into the theatre. Some have identified this Gaius with No. (2).

A man of Derbe who accompanied Paul into Asia on his last journey to Jerusalem

A Christain of Asia Minor to whom John addressed his third epistle (III John 1:1).

See more on the meaning of Gaius in the Bible:
Gaius {International Standard Bible Encyclopedia}
Gaius {Hitchcock's Bible Name}

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