6 months for 2 15km speed tickets and a broken tail light?
There are a lot of very poor drivers on the road already. GDL is designed to get drivers to EARN their license, not just pick up a full-blown license after a fifty question written test and a thiry minute road test. Anyone can behave themselves for thirty minutes.
Picking up three tickets during the period of time that you've had a GDL is indicative of a behaviour pattern. The time that you have a GDL is a time when you need to prove that you are able to follow the rules - you are on probation. The fact that your license is being suspended before you are off probation means that you're not ready for a full license. I can't comment on the validity or fairness of each of thse tickets that you picked up...but I can say that three tickets in a short period of time is unusual. Fraser's probably right about being able to get out of the points for the tail light.
The other question is why you have a GDL now - I know that you've been driving for a while. Are you in the process of getting it back?
I'm not trying to be hard on you...I'm just explaining my understanding of how the system is supposed to work.