I absolutely love this build. It starts off a bit slow because I dont have all the runes yet, but if the game gets anywhere past 30 minutes or so, and i start getting the good items, GP becomes amazing. I have had 2 matches where i bought all the items and still had enough money left over to sell the other Avarice Blade and buy Bloodthirster or Black Cleaver. With those items I was able to kill a full health six feast stack Cho'gath single handed.

This GP build looks close to mine. I like to think I know what I am talking about when I talk about GP because I have only lost 5 games out of 80 I have played with him and the reason why I lost was not me. I would suggest starting out with an avarice blade because it gives some nice crit to start with, it isnt very expensive, and it gives you just a little bit more gold flow. The swift boots are not needed in all reality. You are already going faster than most other champions with with regular boots and 2 phantom dancers. Why not get zerkers or something that will help you survive longer? I usually get starks as my 3rd item because life steal with GP early game helps a lot. Also with your masteries I would suggest putting the last bit into defense.

Hey dude
such a solid build.

But i prefer black cleaver as last item. it grants you high damage and armor reduction. Last Whisper seems to be useful but Gang doesn't need dps that much.
Change the Crit-CH-Runes agains ArmPen. Especially in Late Game ArmPen is much more useful than crit chance or crit dmg.
Furthermore i would like to buy zeal before you buy boots. zeal also gives you ms and it also gives crit chance.

Anyway, nice build
Great Work

nice build.
works good and easy to build.

One alternative:
If you change critchance runes into critdamage you might deal less damage at the very beginning, but later on and aspecially in the endgame squishys against u will start to QQ about you when you start to 1,2k crit with parley and than 1 autohitcrit kills them ;) +1

Simple and effective +1