Specifically, cancer-associated fibroblast, common myeloid progenitor, endothelial cell, eosinophil, granulocyte–monocyte progenitor, hematopoietic stem cell, macrophage, mast cell, monocyte, myeloid dendritic cell, neutrophil, and NK cell were positively correlated with GPX8 expression in both STAD and COAD. This evidence concerns the gene GPX8 and cancer.