If you want noodles, go for egg noodles as they have more protein so let the carb out slower.
I had GD last time from 28 weeks and have been testing since 16 weeks this time - it's back, I'm 25 weeks, but I need a GTT next week to prove it.
Low GI diets are really boring but very healthy so you will find you put on less baby weight over all - every cloud....
I have porridge for breakfast with Agare Nectar, which is like syrup but is low GI cactus juice and they sell it in Tesco with the other free from stuff. It also goes well in Greek yogurt, I've found Total has the lowest carb content and is thick and extra creamy ( If I can't do sugar or carbs I'm damn well not doing low fat too)
Soups with lentils in are a good lunch - I can't do bread at all, I may as well eat a mars bar.
Sunday lunch or any meat and two veg is definately the low reading meal as long as you don't over do the potatoes.
Snacks are hard, what about: baby bel/or any portion of cheese, hommous and veg sticks, small fruit portions like apple or pear, cheesy oatcakes, plain nuts if you're a believer, plain popcorn is OK too but I would prefer to eat a whole bucket full of sweet popcorn, but hey.