Born on February 14th, 2043, Gordon Tracy is a 22 year old.

He revels in all water sports, from skin-diving to water-skiing. A highly-trained aquanaut with stints in the Submarine Service and the World Aquanaut Security Patrol under his belt, Gordon is an expert oceanographer and the designer of a unique underwater breathing apparatus, which he has modified and improved for International Rescue.

As the pilot of Thunderbird 4, Gordon commands the world's most advanced and versatile one-man submarine.

 He is also one of the world's fastest freestyle swimmers and is a past Olympic champion at the butterfly stroke.