Sheen, Beserker Grieves, Zeal, Trinity Force, Phantom Dancer, blood thirster, black cleaver, infinity edge
I rly hate seeing people playing GP as a fully-DPS/Crtl champ. He's one of them most OP champs if he goes off-tanky.
Critplank is really squishy so he does have a good point. Just play it more often and you'll realize how unviable that build is.
I build defensive items and armpen accordingly. I play it quite often and do fairly well. Of course there is always the times you lane against a Trynd and he eats you up.
If you ever complete this build in 3v3 your doing horrible. Even if you do end up winning, you should never get the opportunity to complete such a build in a 3v3 game.
They usually only last up until my phantom dancer, they either surrender or lose before I can get the BF sword of my BT