“ Involuntarily I glanced seaward-and distinguished nothing except a single green light, minute and far away, that might have been the end of a dock.” (Fitzgerald 21)
The green light symbolizes Gatsby’s ambitions in life and his dreams. We come to be told that this light was to resemble Gatsby’s love for Daisy. The green light that Gatsby sees also comes from the dock at Daisy’s house and this is another reason that he always looks at it and uses it to think of Daisy.
The Green Light actually is the light on the Buchanan's dock and this is why Gatsby is always looking at it. Gatsby's "green light" is Daisy. His main goal in life is to get Daisy back. Every night he obsesses over her by looking at that light on her dock every single night.