Hey, what's the easiest way to get alot of GP? And also, if you feed a chocobo multiple greens at once, will its stats raise more than if you were to just feed it one green at once?
Thanks!

It will raise more the more you feed them. Certain greens max out though and you may need to try a better greens to keep getting increases.

As for gp, there is a guy outside the gold saucer, in the area where the tram drops you off. He appears occasionally kinda hiding around the corner of one of the buildings. You'll need to get a lifetime pass and just zone in and out of the gold saucer. When he appears you can buy 100gp off of him for gil. This is repeatable, but requires getting him to appear again. He won't start appearing until after the date scene on disc 1 I believe.