GBP5 and gastric cancer: GBP5 protein tended to be expressed in EBV-positive GC (P = 0.054), and its IHC staining score in the 7 EBV-positive GC cases was markedly higher than EBV-negative GC (3.2 ± 1.6 vs. 1.2 ± 1.5, P = 0.002, Table 3).