There is a higher risk of pre eclampsia with diabetes of any type but you can minimise the risk with diet and even medication. If you had PE with our last pregnancy and your baby had BSL issues it is possible that you had borderline or later onset GD that the testing didn't pick up. I am assuming your doctors/medical team are monitoring you because of your PE last pregnancy? It is not a given you will get it this time. You might like to discuss with them the use of low dose aspirin as a preventative measure. I am type 1 diabetic and my obstetrician had me on low dose aspirin until a few weeks before I was due to deliver as some research has shown it can be helpful in preventing PE...if it worries you talk to your doctors about it hun....

Saturated fats are only a problem because a certain amount is converted to glucose by the body and can cause delayed blood sugar spikes quite a while after a meal, it is a hard one to balance because you need a certain amount of fats for the baby's development. Personally i wouldn't/didn't worry to much about the fat issue, more the glycemic index of the food, aiming for low GI foods as much as possible.