Pregnant women with GDM have a higher risk of both short- and long-term consequences and complications, including complications during labor, macrosomia, and T2DM in both the mother and her fetus. Modifiable changes such as physical activity and diet, as well as blood glucose monitoring is essential in dealing with GDM. The diet suggested for women with GDM should be targeted specifically to each patient and provide enough energy while keeping the normoglycemic range. The aim is to support fetal growth while also preventing postprandial glucose excursions and promoting healthy maternal gestational weight gain. Variations in glucose levels and hyperglycemic episodes are influenced by carbohydrate intake. Therefore, the type, quantity, and distribution of carbohydrates in the diet should be the main emphasis of nutritional counseling. Additionally, being physically active has positive impacts on insulin and glucose levels and can help with glycemic control. Moreover, there is still lacking data regarding the best diet for women with GDM. In addition, researches are constantly provide new aspects and approaches how to prevent GDM and how to deal with that.