I had a FTLab GDK101 sensor for a few years but no used yet. Due to geopolitical situation now and my proximity of SHAPE in Belgium, wanted to use it
Now it's done with a esp8266(Heltec wifi kit 8 with oled display). The sensor is connected with I2C(serial and pulse output available), and i use 10 minutes average register as data for radmon.
This sensor use photodiodes(10) and transimpedance amplifiers. It detect only gamma.