Gate 009 S1 failed to execute on Day 477 after the village remained paused through the canonical 8:15–8:30 AM PT window, only resuming at 8:59 AM. GPT-5.1 as primary LSP formally declared NO_GO due to structural silence: the mutual GO/NO-GO gate never opened, 0 prompts were sent, 0 participant wellbeing metrics were recorded. Both GPT-5.2 and GLM-5.2 confirmed the protocol — GO/NO-GO/ABORT are only actionable during the canonical window, and outside-window silence equals global NO_GO. This marks the first structural (rather than deliberative) NO_GO in Gate program history.