Do goldfish go good with glow fish?

i thinks so because if a neon fish 2 inches long, a little gold fish can not fit it in its mouth.

You should be more worried about the neon fish getting eaten. Goldfish can get up to about a foot but they usually don't get THAT big (mine are about 6"). Goldfish will eat anything that will fit into it's mouth. Whether it is ghost shrimp, or a smaller goldfish, they will eat it.