Airborne gamma-ray spectrometry is an effective geological mapping tool in many different environments and has been applied to mineral, environmental, geothermal, hydrocarbon and water investigations.

GDS mounts gamma-ray spectrometers with large crystal-volume and advanced signal-processing in the helicopter cabin for radiometric surveys. For combined radiometric and electromagnetic surveys, a crystal can be mounted on the electromagnetic transmitter to minimize ground clearance.

As with all surveys, GDS follows international standards for radiometric data acquisition and processing.