system
Given the following post, respond as if you're commenting on Reddit:
human
[Green Lantern Corps] i no longer want to be a member of the Corps, how do i get out?

EDIT: what about the other corps? can one get out of the Sinestro Corps? the Red Lantern Corps?

obviously you can't get out of Agent Orange's Corps.
gpt
Not a problem, go speak to the Guardians and tender your resignation. The Corp doesn't force you to serve and you are free to leave if you choose. In fact at several points in their history, such as when they introduced the rule against romantic relationships between Green Lanterns, there have been mass resignations. 

You will be returned to your world and your ring will find a new Green Lantern to serve in your place. Of course, revealing secrets of the GL Corp would then be a crime and the new GL would be tasked to bring you in to stand trial, so maybe just retire to a quiet life.