I was a gestational diabetic.
The key to treatment is
exercise so you get a healthier LDL/HDL and triglyceride profile and you 'work off' the excess glucose. I hadn't gained too much weight so it wasn't a matter of losing for me. Pre-pregnancy weight was 120 and my highest weight while pregnant was 140 lbs at 36 weeks. I just had to walk,light jogs, swim laps in my
city's rec. pool and eat about 6 small meals all planned out. *My labour was 4 weeks early.
Always eat fibre and protein with your carbs to slow the glycemic load that carb has on your body.
Read labels. A 'serving' of your favourite crackers may be 4 to 6 crackers, not a 1/4 to 1/2 the box.
Don't drink your calories!!! No more pop, no juice, no vente Starbucks Lattes.... Your body doesn't get the same 'fullness' trigger when you drink your food. So even though a good healthy fruit smoothie sounds healthy.... it really isn't. It's better to eat an orange than drink a glass of OJ.
My personal trainer told me NEVER to have more than 12 grams or sugar at once. So, a 'healthy' protein bar with 24 or 30 gr. is waaaaay unhealthy.
The form that a carb comes in is as important as say, the serving size. Mashed potatoes get converted to glucose faster than a baked potato with the skin on (fibre,fibre, fibre!) Sticky Japanese sushi rice? Vooom! That's an instant huge blood glucose spike. Brown rice? Slow release glucose in comparison. If it's white- skip it! White bread, white rice, rice crispies, puffed anything. The more it has been processed you can be assured that your body can convert it to glucose super quick.
Hope this helps, y'all.