If you want the map to center at your location, please set your location correctly when you register. If you want to see your device's history data, please go to gmcmap.com/historyData.asp?Param_ID=********(substitute *s with your geiger counter id)
@donghelan, The time zone setting was for your convenience to enter a time zone once then you don't have to edit the systemTimeZone every time,
I just changed the display for the wrong header so it should work now. The logic is like if you put something in the systemTimeZone parameter then the page is using the parameter, otherwise it uses your time zone in your setting.
If you have more questions we are always ready to help and thanks for using GQ device!