1988 (31).
Frequent GP (und GP Script) user until March 
Since then almost only home experiments for sound design and tutorial purposes and waiting for bigger gigs.
This make you enter in the chart in the two different categories at the same time! 
Let’s wait until GP becomes standard in every middle / high school 
Posted in another topic, but I agree… @bigalminal wins!
It seems I’m among the youngest - 1984. 
Another datapoint: 25 years old and a big fan of Gig Performer and scripting 
(although because of other stuff going on, I do not have much time for tinkering 
)
New user of Gig Performer here: 24 years old (born 1996), and I already use GPScript on a daily basis, since it greatly enhances the communication between my controller and GP3!
Congrats you are our new winner. 
How long have you been using GP?