Hello. The Return Count in the internal TR 102 menu is how long you want the GPS to try and get a position, if you put it to 3 minutes it means that when the device wakes up from sleep-mode it will try to attain its position for a maximum of 3 minutes. This value can be set between 1-10 minutes.
As of build 306 on GpsGate.com, the Time treshold-setting in the Web GUI at Preferences/TrackSetting for Globalsat TR 102 decides how often you want the device to leave sleep-mode and attain/send its position to GpsGate.com. If you set it to 300 seconds the device will wake up from sleep-mode and get a GPS-fix and send this position every 5 minutes. It will try to get a position for the maximum time-period specified in Return count. This value can be set to between 60-86400 seconds (1 minute to 24 hours)
Please note that if this setting is set to less then 120 seconds, the device will never enter sleep-mode, and it will send its position to GpsGate.com every 60 seconds (and use up more battery power this way), therefore its recommended to use a setting above 120 seconds if you wish to conserve the battery.
So in fewer words:
Return count in the internal Tr 102-menu decides how long the device will try and get a GPS fix once ordered to. It will give up after this time has passed even if a proper fix hasnt been achieved, if it does get a good fix however it will stop before the set time period.
Time treshold in the Gpsgate.com Web GUI decides in what intervals the device should wake up and get a GPS fix + send a position to GpsGate.com.