We calculate the very-high-energy diffuse flux of neutrinos produced by the hadronic interactions of cosmic rays (CR) with the gas contained in the Galactic disk. We compare our results with recent neutrino observational data in the TeV energy range. Namely, we perform a comparison of our predictions with the recent hint for a Galactic neutrino component obtained by ANTARES and the new IceCube measurement of a neutrino diffuse emission from the Galactic disk. We take advantage of recent source population studies to evaluate the contamination of sources to observational determinations of neutrino diffuse emission.
By comparing our expectations with IceCube measurement, we constrain the fraction of Galactic TeV gamma-ray sources (resolved and unresolved) with hadronic nature. We finally discuss the constraints that can be obtained on the CR spatial and energy distribution and, hence, on the gamma-ray and neutrino diffuse emission.