Gex and his family live in
Maui,
Hawaii. His mother raised him and his three younger siblings while their father worked for
NASA. Gex's hobbies include spending time with his friends, surfing, playing the ukulele, and throwing poi parties. One day, Gex's mother gets a phone call from NASA, explaining that Gex's father and ten
human volunteers died when their rocket exploded on the launch pad (according to the manual, the explosion was caused by a Band-Aid floating in one of the fuel tanks).
[3]
Soon, the gecko family's carefree life is shattered when Gex bottles up his emotions and takes refuge in front of the television to get over the tragedy, only to become obsessed. Three weeks later, he becomes an addict to TV. After several unsuccessful attempts to get Gex to stop watching TV and consulting with a minister and friends at work, Gex's mother decides it is time for a change. The gecko family moves to
Encino, California, Gex's TV is taken away, and he flees from home. After several months of living on the streets, Gex inherits an enormous amount of money, and he moves back to Maui to live in a mansion, and buys the world's largest TV.
While watching TV one day, Gex swallows a passing fly, not knowing it is a sort of miniature transmitter. Moments later, a huge hand shoots out of the screen and grabs Gex by his neck, pulling the young gecko into his own TV. The cold claw belongs to Rez, the overlord of the Media Dimension, who intended to make Gex his new mascot and conquer the world.
[4]
Gex traverses through the worlds of the Media Dimension based on different genres; the Cemetery (
Horror films), New Toonland (
Animation), Jungle Isle (
Adventure films) and Kung Fuville (
Martial arts films). The first world he encounters is an enormous dome, surrounded by four large TVs. Gex then goes through the large TVs, collects the remotes, and defeats the various worlds' guardians in turn: Morphina, the Flatulator, Sun Snake and Toxic Turtle. Gex also collects pieces to another remote, which allow him to travel to the mysterious Planet X. Once Gex manages to collect all the worlds' remotes, the Dome opens and he travels down to Rezopolis, the capital of the Media Dimension.
Once inside, Gex defeats Rez in a head-to-head battle, using one of Rez's own mechanical bugs, and Rez transforms into a ball of energy and escapes through a hole in the dome. Gex is then teleported back to his home in Maui, and looks back and his last words in the game are "
Hey, cool. I wonder what's on HBO."