The Gumshoe is a modified variant of the Burrito, manufactured by Declasse. It only appears in GTA: Chinatown Wars in the missions Sources (PSP) for Chan Jaoming and Scrambled for LCPD undercover officer Wade Heston. The vehicle does not appear in regular gameplay.
In the mission Scrambled, a Gumshoe is parked in an alleyway. If they player attempts to hijack it, the van will be locked.