[en] GEANIE is a multi-detector, high-resolution gamma-ray spectrometer that is operated as a collaborative effort between Lawrence Livermore National Laboratory and Los Alamos National Laboratory. The WNR high-energy spallation neutron source at the Los Alamos Neutron Science Center (LANSCE) provides GEANIE's beam. GEANIE enables new measurements of neutron-induced reaction cross sections and fission fragment studies with neutrons with incident energies from 1 to 200 MeV and excellent γ-ray energy resolution. Results of first studies are aimed at providing information for such diverse areas as improved cross section data for stockpile stewardship needs and calibration of high-energy neutron fluence monitors for applications in Accelerator Production of Tritium and Accelerator Transmutation of Waste