Welcome aboard!
First off, the '00 G20 is a great car - I owned one, and I miss it.
The VQ swap HAS been done. However, it's NOT going to be cheap, even if you already have the engine and trans. In reality, it's a lot more weight in the nose, for not a lot of gain. You'd be better off selling the motorset to someone who wants to fix a blown-motor Z or G35, and go find a SR20VE.
There'a a TON of info here about it, and with the right mods, you can get pretty close to VQ power... for a LOT less money. I paid $600 for my SR20VE (several years ago) and it ran awesome.
Stick around, we're glad to help. It'll be a great car when it's done.
