Like some already pointed out this statement is only true in some localities. In Georgia it is NOT true. Our GWL is NOT linked to our DL and the info resides in different databases with different agencies within the state. The LEO has ZERO access to the GWL info on scene.
How to act? As one would always act ... like a gentleman, of course.
Here's my process;
pull over to a safe place ... safe for me and for the LEO who will be on foot alongside traffic
turn off radio
roll down window all the way
have DL in hand already before the LEO gets to my window
hands on steering wheel
if dark, turn the interior light on
don't reach for anything or dig around for anything ... in GA we don't have to show registration unless asked so I leave it where it's at rather than digging around in the dash for it
speak to the officer politely & professionally ... same as I expect to be treated
let him dictate the way the stop goes, not me
Side note: In GA we are not required to tell the LEO up front we are armed. Some states DO require this. Know the law in your state. I don't volunteer this info unless I asked. I have never been asked to step out of my vehicle but if I am asked ... at that point I will prob let them know I am armed. If a LEO asks me directly if I am armed I will answer truthfully and offer my GWL for their inspection.