Tom Daley won a gold medal in the men's synchronised 10-metre platform diving event at the Tokyo 2020 Olympics (held in 2021 due to the pandemic). This is his only Olympic gold medal. He also won gold medals as a double world champion in the FINA 10-metre platform event (2009 and 2017) and multiple golds at European and Commonwealth championships.
Summary of Tom Daley's golds relevant to your question:
- Olympic gold: Men's synchronised 10m platform, Tokyo 2020 Olympics
- World Championship golds: 2009 and 2017 in 10m platform
- Commonwealth Games golds: multiple including 10m synchro and platform
Hence, Tom Daley's Olympic gold came in Tokyo 2020.
