A total of 19 genes that may be candidate genetic markers for GDM were mapped through functional mapping, in which twelve (APC, BRCA1, CLOCK, GRIN3B, GSK3B, NR3C1, PRDM16, SALL3, SYCP2, TMEM259, TPH1, and TPH2) were directly mapped by variants genotyped in our study. This evidence concerns the gene NR3C1 and gestational diabetes.