At the end of the chapter, we (through the narrator) finally see Gatsby doing?

When Nick arrives home, he sees Gatsby for the first time, a handsome young man standing on the lawn with his arms reaching out toward the dark water. Nick looks out at the water, but all he can see is a distant green light that might mark the end of a dock.

He's standing outside of his home looking out at Daisy's house across the water.