Pigeon is a small town in Utah, that, among other things, is the location of a doll factory. Following a lead provided by Didi Gibbons, Mark Benford and Demetri Noh travels to Pigeon, hoping to catch the right "D. Gibbons". There they encountered a still unidentified man who nearly kills them, but managed to escape. When reviewing his online activity, the FBI discovers that he had been trying to investigate the GBO by himself.
In real life, Pigeon, Utah, appears on some maps as nothing more than a named place where a railroad route temporarily splits into two parallel tracks, possibly so some train cars can be parked. There do not appear to be any residences or warehouses.
The name of the town fits a bird motif running throughout the series.