 Gus, born sometime in June 1977, has been Shawn Spencer's best friend since childhood.Together they co-own the detective agency "Psych", after Shawn was able to forge Gus' name on the lease.Gus tends to be strait-laced and more cautious, although he has been friends with Shawn for long enough that he understands that Shawn cannot be stopped once his mind has been made up.