For what it is worth,

I read the rule as "Gaze : Someone who has met your gaze for a full three seconds calls out or whispers
"By my gaze" followed by an effect. A vampire might whisper "By my gaze - Paralyze by Will."
Other creatures might cause fear or other effects."

I take "met your gaze" as meaning that you need to have eye contact for 3 seconds.

Now, I do not take that to mean a concentrated, eye locking, drilling-thru-the-other-person's-head gaze ...

But, if I am talking with you and we are face to face looking at each other,
then after 3 seconds I could then call a gaze effect ...

This comes under some of the "honor system" of the rules,
which seems like it ought to be easy and simple - but often times is anything but ...

-Chris