Short answer: Golden Gate bridge is named after the Golden Gate Strait (of water) that runs below it.
The color of Golden Gate Bridge is officially an orange vermilion called international orange. This color was selected because it complements the natural surroundings and enhances the bridge’s visibility in fog. So, why isn’t the bridge called Golden Orange Bridge?
Golden Gate Bridge is named for the Golden Gate Strait. This narrow stretch of water below the bridge connects the Pacific Ocean on the west to San Francisco Bay on the east.
As for the strait itself, its name predates the start of the Gold Rush in 1849. In 1846, when explorer and future presidential candidate John C. Fremont saw the strait, it reminded him of another landlocked harbor, The Golden Horn of the Bosporus in Constantinople (present-day Istanbul). Fremont used the Greek word, Chrysopylae, to name it. Chrysopylae translates to Golden Gate in English. In his 1848 “Geographical Memoir,’’ Fremont wrote, “The rugged opening to the Pacific is a golden gate to trade with the Orient,” and this how Golden Gate Bridge got its name.