If it's tempered then not even a professional can do it, tempered glass is under constant stress (tempering), drilling it will release the stress (which is actually tension) and cause the whole piece to shatter..
Plate glass can be drilled, typically I think people do this with a piece of copper pipe and some very fine sand.. (friction cut). Personally, I think it's best to leave this one up to professionals, they break it they bought it, you break it and you have to replace it.