I also have GDM. I am 44 years old with 1st pregnancy, GA 19+ wk. I decide to on diet control, use Glucose Strip test and just bought a Continuous Glucose Monitoring device to see the pattern of the glucose level after eating each meal/food. It was found that only small amount of rice/noodles can cause my sugar to increase from 80 mg/dL to 150 mg/dL. A 3-in-1 coffee with less sweet caused my sugar upto 120. So, I eat very low carb diet, no rice/noodles/bread/cake/ice cream/ sweet drink/snacks,etc and eat more on protein, like eggs, milk, chicken, etc. Protein diet can make me very full and keep sugar level less than 100 mg/dl. I get use to no sweet flavour now and I will do it for life to prevent type 2 Diabetes after giving birth, and consequently chronic illness from DM.
You can do it 💪😀