A novel 8-point G-CMAP score can help surgeons predict postoperative complications after gastrectomy for gastric cancer, enhancing patient selection.

• Postoperative complications occurred in 18% of patients.
• Key predictors include C-reactive protein, monocyte count, serum albumin, and prothrombin time.

This tool shows modest predictive ability (AUC 0.68) and can guide clinical decision-making for better surgical outcomes.

• The G-CMAP score can identify high-risk patients who may benefit from closer monitoring and intervention.