The influence of the ionizing agent was studied γ- about radiation on optical characteristics and coordination compounds of germanium (ССG). It was established that for ССG with H4 OEDPH, a complex compound of germanium with tartaric acid and zinc, as well as CCG with tartaric acid and sodium under the influence of γ-rays for the 450 nm band almost complete transmission of incident light is observed for all samples. Absorption stability at a specific wavelength ionizing gamma radiation makes it possible to use CСG to build a γ-radiation sensor.