  Cosmological gamma ray bursts are very likely powerful sources of high energy
neutrinos and gravitational waves. The aim of this paper is to review and
update the current predictions about the intensity of emission in this two
forms to be expected from GRB's. In particular a revised calculation of the
neutrino emission by photohadronic interaction at the internal shock is
obtained by numerical integration, including both the resonant and the
hadronization channels. The detectability of gravitational waves from
individual bursts could be difficult for presently planned detectors if the
GRB's are beamed, but it is possible, as we have proposed in a paper two years
ago, that the incoherent superimposition of small amplitude pulse trains of
GW's impinging on the detector, could be detected as an excess of noise in the
full VIRGO detector, integrating over a time of the order of one year.
