We did not confirm associations with GDM of loci connected to GDM elsewhere, including variants in the HKDC1 (rs10762264), GCK (rs1799884), KCNJ11 (rs5219), IGF2BP2 (rs4402960), TCF7L2 (rs7903146), CDKAL1 (rs7754840), FTO (rs9939609) and IRS1 (rs1801278). The gene discussed is GCK; the disease is gestational diabetes.