This may be old news to many folks, but I haven't seen it. And of course, Gannon is Guckert's alias, so...
I just re-read that article "Jesus Plus Nothing", about the Fellowship/Foundation, by Jeffrey Sharlet and printed in Harper's, and one of the young men staying in Ivanwald is named "Gannon", or Sharlet refers to him that way.
http://www.harpers.org/JesusPlusNothing.html?pg=1 From inside the house, waiting for a phone call, he opened a second-floor window and called to Gannon for a ball. Gannon, the son of a Texas oilman, worked as a Senate aide<3>; he had blond hair and a chin like a plow, and he sang in a choir. He tossed one up, which Bengt caught and dispatched toward the basket. “Nice,” Gannon drawled as the ball sank through.
I thought that was a funny coincidence.