@MajidHojati Apologies, haven't been on the site for a while. The blog I posted this to doesn't belong to me, so unfortunately this article will have been lost. I could not reproduce it in full elsewhere (e.g. here), because it was done as part of my job, and so the material wasn't my own IP, even though I wrote it.

Excellent, thanks for the resources! For the interested, the syntax goes like so: google.maps.event.addListener(myLayer.mapObject,'zoom_change‌​d',function() { /*whatever*/ }); ... assuming your event is 'zoom_changed' and your layer is myLayer

Wait, so what exactly are you doing, what do you need, and how is it not working?