Laser ablated germanium atoms and electrons have been co-deposited with O-2 in excess argon at 11 K. In addition to previously assigned O-4(+), O-4(-), O-3(-), GeO, and GeO2 species, GeO2- and GeO4- anions were produced and identified from isotopic splittings on their matrix infrared spectra and from density functional theory calculations. In contrast to linear GeO2, the GeO2- anion is bent with a bond angle estimated to be 134 +/- 2degrees based on the isotopic nu(3) vibrational frequencies. The GeO4- anion was predicted to have nonplanar C-s structure with significantly high vertical detachment energy.