I was close to it. Then they updated GaG and I went down two levels. Now I don't even know the points I have to get. That aspect of the new GaG sucks. Overall to answer your question it depends on how active a user you are, but it's still going to take a few months. These masters and gurus I've seen for quite sometime. Ask like MartyFellow he told me one time.
I've been here for over 5 years now and still haven't reached it on this new version of the site. On the old site, I would have been at the guru level already, since you only needed 10,000 points. Now you need 20,000. I'm just over 5K away.
It just depends how frequently you ask and answer questions, really. Some people reach guru status in a year, others only get there after several years (like me).