I don't know anything about gestational diabetes and only have a basic understanding of diabetic dietary restrictions, so forgive me in advance if I totally bork this. But, I love these little keto cheesecakes:

http://allrecipes.com/recipe/239793/keto-cheesecake-cupcakes/

Like most folks, I added a 1/2 cup of coconut flour to the crust, and I used Swerve (don't know if you can eat sugar subs). They came out so so good, to the point where my completely non low carb husband is like "MAKE ME A BIG ONE!"

Obviously they're small, but they're incredibly satisfying.

Nutrition Facts
Servings 12.0
Calories 204 per serving
Total Fat 19 g
Total Carbohydrate 12 g
Dietary Fiber 2 g
Sugars 3 g
Protein 5 g