Though the actual quote is "Stay golden, Pony boy." It is perhaps one of the most well known quotes from a piece of literature. It is something that resonants with everyone who has every read the book or seen the movie.
I tried not to snicker at the banner. It reminded me of the GPs, the golden people. If you were real gold, why did you need to 'stay gold'? Only fake gold tries to 'stay gold'. And that's exactly what all the GPs are, fake gold.