Conversion of gamma radiation into useful electricity?

Solar cells (and chlorophyll in plants/plankton) capture photons and convert it into useful energy. Electricity from solar cells and energy for ATP production in photosynthetic organisms. Should it not, in principle, be possible to capture gamma radiation and convert it into useful energy such as electricity? It would seem that if this could be done you could generate electricity for use in space probes regardless of location and independent of sunlight.