This study aimed to investigate the T2DM known single nucleotide polymorphisms (SNPs) of the adiponectin C1Q and collagen domain containing (ADIPOQ), cyclin-dependent kinase inhibitor 2A and 2B (CDKN2A/2B), and signal sequence receptor subunit 1 (SSR1) genes in a cohort of Romanian GDM pregnant women and perinatal outcomes. Here, CDKN2A is linked to type 2 diabetes mellitus.