Pregnant women who established prenatal examination cards in the prenatal outpatient department of our hospital from January 2025 to September 2025 were selected. According to the inclusion criteria, 200 high-risk pregnant women with gestational diabetes mellitus (GDM) were selected. 100 people in the control group received conventional nursing intervention measures, and 100 people in the intervention group adopted the family-centered wechat platform interactive management nursing model. The observation period was from the start of prenatal examination to follow-up until delivery. The blood glucose conditions, glycated hemoglobin (HbA1c) levels, incidence of GDM, and weight gain during pregnancy of the two groups of pregnant women were observed. The pregnancy outcomes included: Gestational age at delivery, gestational complications (gestational hypertension, diabetic ketosis, preterm birth, post-term pregnancy, urogenital tract infection), polyhydramnios, mode of delivery (induced labor, shoulder dystocia, cesarean section), premature rupture of membranes, postpartum complications (postpartum hemorrhage, puerperal infection), etc. Perinatal outcomes: including fetal growth restriction, macrosomia, preterm birth, stillbirth, fetal malformations, fetal distress, neonatal respiratory distress syndrome, neonatal hypoglycemia, etc. We applied FCC to pregnant women at high risk of gestational diabetes mellitus (GDM) and advanced the intervention window to the beginning of prenatal examination (8-10 weeks of pregnancy). This may be able to improve weight gain and blood glucose levels during pregnancy in high-risk pregnant women, reduce the incidence of GDM, improve the final maternal and infant outcomes, and provide a certain theoretical basis for prenatal nursing intervention in pregnant women at high risk of GDM in the future.