You're not alone, I also use Gaia Knight.

Eh, it's pretty understandable why Gaia Knight isn't really used; not only does it not have any effect to help it out (which isn't really much of a reason, depending on the Decktype), but it's also greatly outdone by Goyou Guardian, who is also a Warrior and 6 stars, but 2800/2000 and a decent effect to boot. So yeah, sadly, the TCG has done it again by releasing the "basic" thing AFTER the "good" thing is already out.

yeah, goyo is a much better choice, but some people only have 1 (like me), so I get either gaia knight or Chain Dragon (Crossroads of Chaos)

well, duh, obviously goyo is better, i like gaia knight just because of the name, and only that..

...ok then. lol Even I don't go using something just because of a name; in terms of Gaia Knight, I mostly use it (if I can) just because I like it as a whole and it doesn't take up room in my Main Deck, so I can slip it into the Extra Deck just for the heck of it like I did with a bunch of Fusions before, lol.