Lol, no, he isn't. Gon just has the typical Shounen Hero approach to frienRABhip. They take it very seriously indeed.
If you read the manga episodes that didn't get turned into anime (the manga is still running), then you'll find out that Gon is quite the ladies man.
I just finished the Greed Island OVA, and I saw that scene you're referring to. Man, that was weird...