Of 546 PD-L1+ patients enrolled...TIS+ICC showed statistically significant and clinically meaningful OS improvement vs P+ICC (HR 0.74 [95% CI: 0.59-0.94], mOS 17.2 vs 12.6 mo; 1-sided P= .0056). Compared with P+ICC, TIS+ICC also had longer PFS (mPFS 7.2 vs 5.9 mo; HR 0.67 [95% CI: 0.55-0.83]), higher ORR (50.4% vs 43.0%), and more durable response (mDoR 9.0 vs 7.1 mo)....In RATIONALE 305, TIS+ICC provided significant and clinically meaningful improvement in OS vs P+ICC with well acceptable safety as 1L in PD-L1+ patients with advanced GC/GEJC.