In conclusion, our study does not provide evidence in favor of GALNT2 rs4846914 and rs2144300 SNPs being associated with GDM in Southwest Chinese women, but demonstrates that rs4846914 and rs2144300 polymorphisms in the GALNT2 gene are associated with blood pressure variations in nonobese GDM and AI in overweight/obese GDM patients. The gene discussed is GALNT2; the disease is gestational diabetes.