Marvel is reimagining/relaunching a character from the 40s and 50s named Millie the Model and updating it for today, so naturally, Tim Gunn would be a part of that. The new title will be called Models, Inc. and the story line featuring Tim Gunn is called "Loaded Gunn".
According to the interview he gave on The Daily Show, he actually ends up in the Iron Man armor at some point.