If his Super Saiyan bothered you I think you didn't get it. Seriously, there's a huge difference between what Goku or other shounen characters go through to what Gon did.
First there's context and reason, I've covered this.
But let's look at it visually.

See? Golden light, golden hair... all bright colours. Goku or whatever has powered up in the nick of time to defeat the bad guys in an epic battle of wills.
But dude.

Does that look anything like your typical power up? Yes it's a trope, but Togashi twists these things around all the time. I've said this before, the Ant Arc is a battle shounen but NOT at the same time. If it were then a lot of things would have gone differently.
Gon would have defeated King after Netero died in the same way he defeated Pitou minus the hate.
Youpi would have been beaten by Knuckle and Shoot.
Ikaglo wouldn't have existed.
Pouf by Morel and maybe even Knov because shounen characters that break down always come back in the final moments to save their friends