Here's what happens to him:
* He's kidnapped and trapped in a bathroom with Adam: The movie begins with Dr. Gordon discovering that his wife and son have been kidnapped, and he receives instructions from Jigsaw to play a deadly game in order to save them.
* He's forced to saw off his own foot: The game involves a reverse bear trap clamped on his head, and he must saw off his own foot with a rusty pipe to prevent it from crushing his skull.
* He escapes the bathroom: After successfully completing his task, Dr. Gordon finds a way to escape the bathroom.
* He confronts Jigsaw: He eventually confronts Jigsaw, who reveals the true nature of his games and his reasoning.
* He's left for dead: Jigsaw leaves Gordon, believing him to have learned a valuable lesson about appreciating life.
* He's found by police: Dr. Gordon is found by police and taken to the hospital, where he is treated for his injuries.
However, the story doesn't end there:
* He becomes the target of Jigsaw's apprentice: In *Saw II*, it is revealed that Gordon has survived and is now being targeted by Jigsaw's apprentice, who is intent on completing Jigsaw's work.
* He's captured again: He is captured and subjected to another deadly game, which he eventually escapes.
Ultimately, Dr. Gordon's fate is a testament to Jigsaw's twisted philosophy, and the lengths he will go to to test the limits of human endurance.