I went to high school with Gaudio. He dropped out after Short Shorts became a hit. He was a nice guy, kind of quiet and a talented musician. Several years ago part of our high school reunion included seeing Jersey Boys on Broadway. Bob, who was involved in producing the play, attended to meet his old classmates.
As Intpseeker mentioned, Gaudio was one of the Four Seasons, but that was just the tip of his iceberg. He wrote or produced for Michael Jackson, Roberta Flack, Barry Manalow, Neil Diamond and others.