A transcriptome-wide association analysis was performed by the TWAS hub to estimate the genetic association between the risk of type 2 diabetes and tissue-specific expression of the genes whose co-expression is related to the disease risk alleles of SNPs of the GSS (rs13041792) and GGT7 (rs6119534 and rs11546155) genes. Here, GGT7 is linked to type 2 diabetes mellitus.