Google calendar : use the "notification" attribute of an event

Hello,
Sorry if my english is bad and sorry if I don’t post on the right place.
I’d like to know if it should be possible to use the “notification attribute” of a created event in the google calendar as a trigger.
I mean : when I create an event on the google calendar site, I set in this calendar the notification with a the offset that I need for this event (to be notified on time that I have to go, what depends of the travel time, so can be 10 min or 5 hours or…). So, each of my events has its proper offset, I can not use the same offset for all events.
Sorry if this funcionality exist, I’m looking for it for a while (monthes) but never found the right way.
Thanks