bq27621-G1 System-Side Fuel Gauge - default values and exit shutdown mode

Hi all

I have a fuel gauge connected to CC2460

When I wake up from unexpected reset, even after I disconnected the battery, the FG set/get is not working

But, when I do what needed to exit shutdown mode (. If the device is in shutdown mode, then toggling GPOUT will make the gauge exit shutdown)- everything is OK

spec: http://www.ti.com/lit/ds/symlink/bq27621-g1.pdf  

my questions are:

1. in the spec: after reset it back to default values. what are the defualts? especially the shutdown mode

2. if it was in shutdown mode before reset occors, after disconnecting the battery,  is the FG remember the shutdown mode that was before?

3. Is there any problem to toggle GPOUT  in order to make the gauge exit shutdown, even if it is NOT in shutdown mode?

Thanks ahead to all who answer