A 29-year-old woman at 26 weeks' gestation undergoes a 75 g oral glucose tolerance test because of obesity and a strong family history of type 2 diabetes. Results: fasting plasma glucose 5.4 mmol/L, 1-hour glucose 10.8 mmol/L, 2-hour glucose 8.2 mmol/L. According to Diabetes Canada diagnostic thresholds for gestational diabetes mellitus (GDM), how should these results be interpreted?