Do I get everything or just end the game?

[Hero without a Name]

I'm at the point on FF8, disc 3....don't want to spoil anything so

Spoiler: I just saved Rinoa in Space, found out Laguna is the President of Esthar, and i'm about to attack Luntiac Pandora.

Here's the only thing, I'm missing a few GF's and while it's not impossible to get them or the final items for weapons, it's difficult. Specifcally because I'm at a higher level now, so now I'm torn about what to do.

Do I bite the bullet and try and go for everything including the missing GF's and Squall/Zell's final weapons? Or do I say screw it. Attack head on and end the game. I really don't know. Hence why I'm asking? Do I end it? or do I want to power up?