Chappell and Flintoff, former captains of Australia and England respectively, were among those to criticise Gayle's conduct.
But Gayle, in an extract from his autobiography published in The Times on Monday, said of his remarks during the Melbourne Renegades' match against Hobart Hurricanes: "I meant it as a joke. I meant it as a little fun. I didn't mean to be disrespectful and I didn't mean it to be taken serious."
Flintoff responded on Twitter by saying Gayle had made himself look a "bit of a chop".
But Gayle, in his autobiography, said: "The only chop Freddie (Flintoff) knows is when he used to bowl short to me and I would chop him past backward point for four."