 In the Lee Goldberg novel "Mr. Monk Goes to Germany", it is mentioned that Gus (although not referred to by name) has met Natalie Teeger.This is implied when Natalie mentions that the group of detectives' sidekicks she regularly meets with sometimes has other such sidekicks as guests, one of which is mentioned to be a man who is sidekick to a false psychic (a clear allusion to Gus).In a cross-promotional ad with "Royal Pains", Gus tries to hard-sell Hank Lawson on becoming Hank's pharmaceutical rep in a bathroom to the point of creeping Hank out.