The AUCs of the FGT model tested in the subset of luminal A, luminal B, HER2 enriched, and triple-negative breast cancer were 0.632 (95% CI, 0.459–0.806), 0.682 (95% CI, 0.579–0.785), 0.500 (95% CI, 0.151–0.848), and 0.635 (95% CI, 0.301–0.969). Here, ERBB2 is linked to triple-negative breast carcinoma.