The GDC contains a wide range of data types, including genomic, transcriptomic, epigenomic, and clinical data. This includes sequencing data, such as whole genome sequencing (WGS), whole exome sequencing (WES), and RNA sequencing (RNA-Seq), as well as data on gene expression, DNA methylation, and other molecular characteristics. The inclusion of clinical data, such as patient demographics and treatment outcomes, allows researchers to correlate genomic findings with clinical phenotypes.