Chile recruited Robledo for the 1950 FIFA World Cup, even though he spoke no Spanish. He made his debut in the opening group game against England (one of his opponents reputedly warned him after he'd hit the post "Steady, George, you're not playing for Newcastle now, you know") and scored in Chile's 5–2 victory over the United States. He was in the Chile squad for the 1955 and 1957 South American Championships, finishing as runners-up in the former tournament.