I also had gestational diabetes and I must say, your numbers are excellent! I was on insulin 3 times per day and no matter how perfect I was my numbers were rarely good. My son, now 9 months old, was born without any problems and my diabetes went away almost immediately!
As far as waking up hungry and snacking, I didn't experience that but remember learning that insulin levels drop during the early morning hours and snacking is good so you don't crash while you sleep. High blood sugar levels are bad, but too low is flat out dangerous! So your body seems to know this and wakes you up to eat.
I don't think you have anything to worry about at all! Just make sure when you go into labor they monitor you for too low numbers. When I was in labor, of course unexpected, my endocrinologist was not notified and the insulin I was supposed to be on was never administered. I was told not to eat anything and because I knew about the dangers of low blood sugar, I monitored myself and had my partner smuggle in snacks to keep my numbers from crashing. I was shocked at how little the medical staff and even doctor knew about this. After talking with the head nurse a few days after my son was born I received a lot of validation and the hospital mandated diabetes training for all nurses on the maternity ward.
Probably too much information you didn't even ask for! But I figured it might help you or someone else reading this post:)
You sound like you are doing great and will have a wonderful and healthy baby! Congratulations!!!