Your nutritionist should be pretty prescriptive about how many carbs you should eat & when & how to pair it with other protein & fats. And she should provide you a calorie goal to stay healthy.
I was provided both an 1800 and 2000 calorie plan. The only difference in the plans was the recommended protein & fat portions. Here was my breakdown on the 2000 calorie plan, which seemed like WAY too much food:
Breakfast:
15g carb (like 1 slice bread or oatmeal)
at least 14g prot (scrambled eggs, or greek yogurt)
1 fat (butter or peanut butter on toast)
Morning Snack:
15 g carb (dairy) like a latte
15 g carb (starch) like pita with hummus or crackers
at least 7g prot (chicken or 1oz cheese)
Lunch:
30g carb like bread or rice or pasta
at least 21 g protein (turkey, chicken, etc)
1-2 servings veggies
15 g carb like fruit
1 fat (like avocado or salad dressing)
Afternoon Snack:
15g carb starch (crackers)
at least 7g prot (peanut butter or cheese or greek yogurt)
15g carb fruit
Dinner:
15g carb (dairy)
30g carb (starch) like potato or pasta or some veggies like beans, squash
at least 21g prot (3oz chicken or steak)
1-2 servings veggies
15g carb (fruit)
2 servings fat (butter, or olive oil, etc)
Evening Snack:
15g carb (dairy)
at least 7g protein (go-lean cereal or cheese or a hard-boiled egg)
15g carb (starch) like cereal or oatmeal
It sounds like SO MUCH food, but the important thing is it's REAL FOOD, not processed, no hidden sugars, and your carb intake is controlled and always paired with protein.
One thing to get advice on from your nutritionist is which foods are considered carbs. Yogurt, Beans, Potatoes, Butternut Squash, Hummus, are all considered carbs for GD, even though usually I'd consider them proteins or veggies. On the plus side, you get to consider peanut butter, and cheese as proteins and not fats!