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Black holes surrounded by a disk or torus may drive the enigmaticcosmological gamma-ray bursts (GRBs). Equivalence in poloidal topology topulsar magnetospheres shows a high incidence of the black hole-luminosity $L_H$into the surrounding magnetized matter. We argue that this emission isre-radiated into gravitational waves at $L_{GW}\simeq L_H/3$ in frequencies oforder 1kHz, winds and, potentially, MeV neutrinos. The total energy budget andinput to the GRB from baryon poor jets are expected to be standard in thisscenario, consistent with recent analysis of afterglow data. Collimation ofthese outflows by baryon rich disk or torus winds may account for the observedspread in opening angles up to about $35^o$. This model may be tested by futureLIGO/VIRGO observations.Comment: To appear in ApJ

Calorimetry of Gamma-Ray Bursts: Echoes in Gravitational Waves