Here is my gangplank build and please before you decied you do not like my build try it! because ill admit on papper the buuild doesnt look to goodd, but the maths behind it all is smart and you will win games. Think about it, all gangplank really needs is damge and crit and infity edge gives you the best damge and second best crit! so go try have fun. Also my runes are not set runes, i just prefer crit damge to armor pen.

With this GP build you will be able to take out there carries so fast they wont be there. This alows your team to get the next big threat knowing you will take out there carry within 3 hits. Last whisper is not alwas need some other usefull items like bloodthirster or warmogs could be bought if the emeny team is not stacking armor. Rember when playing GP your farm is everything.

Pros

Your Q hits for a tone
Your W can break any kind of cc (even ww and malzs ult)
Your E give you amazing speed normal and give bonus attack speed and movment speed when activated
Your R can be used to help get any lane a kill or farm minions

Cons
You will be foucsed
You are squish
This build is very dear
Youe ult is not very damgeing

Hope you enjoyed reading my build!
Any feedback would be apprecated!
Like i said try before u comment!