This is how I figure it will run for you:
5:00 - Check in at Boma
5:30 (at the latest) - Be seated at Boma
6:30 - Finish eating at Boma
8:00 - Arrive at DTD for Cirque
Given what looks like a roughly 1 and 1/2 hour break between the end of your meal and when you should arrive for Cirque, I don't think you'd have a problem at all. Do you plan to drive from AKL to GF, or take a bus? If it's a bus, you have to remember that you can't go directly from one to the other. Your best bet for a bus would be to take one from AKL to AK, and then take one from AK to GF.
Edited to add: I suggest arriving 45 minutes to an hour early for Cirque because you'll want to be seated as soon as they allow you in the building because they have a pre-show that's really cute. We actually arrived at 8:30 on the dot, got to our seats by 8:40, and didn't have a problem, so you shouldn't either.