That seems way too hot.
I don't see any spec in the 320 manual but I would imagine the 203 would have similar temp specs.
I have not used a 320, so I could be wrong. Wait for someone with more Gecko experience to respond before you come to any conclusions.The case temperature
(measured on the bottom plate) should not exceed 70 degrees C, and for best life should be kept to 50 degrees or
less. Use heatsink compound between the G203V and the heatsink.