  Monitoring of high energy cosmic ray neutrons is of particular interest for
cosmic ray water Cherenkov detectors as intense bundles of delayed neutrons
have been found to arrive after the initial passage of a high energy air
shower. In this paper we explore the possibility of building large-area
high-energy neutron monitors using gadolinium-loaded Water Cherenkov Detectors
(WCDs). GEANT4 simulations of photon production in WCDs are used to estimate
the maximum detection efficiency for a hypothetical system. Requiring a series
of neutron induced gamma ray flashes distributed over an extended period of
time (up to 20{\mu}s) was shown to be an effective way to discriminate high
energy neutron interactions from other backgrounds. Results suggest that
neutron detection efficiencies of 4-15% may be possible using a
gadolinium-loaded detection system above 200 MeV. The magnitude of gadolinium
loading was also shown to significantly modify the timing response of the
simulated detector.
