I've followed KG closely for a long time, since early high school in Mauldin, SC, then to Farragut in Chi-Town, and on to Minny, and have heard of only one brief incident that was remotely negative, (and was in fact the result of standing up for someone he thought to be unfairly slighted).
Every other story or friend or coach or team-mate or reporter I've heard speak of him objectively, (and not the result of any kind of bias), has had nothing but incredibly positive, supportive, and admirable things to say about him. He is truly a rare and unique human being, and one whose kindness and philanthropy an important part of his daily life.