now a good build would be
ninja tabi
sheen
IE
duskblade of duktharr (+75 attack damage, +5% movement speed, Unique Passive: +10 armor penetration, Unique Passive: Basic attacks on enemy champion apply Nightfall)
dead man's plate for da heroics after APC bursta ya you go take that ADC like a true terror gatta boom slice boom ping!

tankplank sucks so bad....as a tank he has no CC to even peel for his allies.. besides that slow. and warmogs aint no good. i only buy on soraka if end game for the heal up. no point warmog on a tank without no titanic hydra. and ***ing stupid ****. GP hp is laughable compared to voli or cho'gath. unbelievable. simply unbelievable this pimp.

APlank is even worse to the level of are you ***ing serious? any APC that fed can 1 shot whoever he likes, but no... not with GP. all he has is a q and E DAFUQ!!!!!!! and that ult...hmm so i going to burst a guy with q e and r..... that's one skill missing lame to the point of tardhoood.

now critplank. that's a good man. i won't flame that guy. well he can get one defensive item.. like dead man's plate and i still won't flame.
srsly get merc treads, sheen, static shiv, infinity edge, and you're good to go. he doesn't really run outta mana so screw that MF item... he really reminds me how ****ty MF is too. so ***ing team reliant. the two can work out well though. MF ults. GP cleans up. perfecto mundo
11111.

anyways, my personal build will be ninja tabi, sheen, and infinity edge and that's it!
items definitely not getting... death's dance... thinking of gangplank doing some karthus imitation makes me wanna vomit anyways. or statikk shyv... a weak sauce no damage item with AS...dafuq!!!!! phantom dance = another weak sauce **** only good when comboed with that weakass EZreal MissyF item. so bad it deserves no mention. basically gangplank doesn't need any item that has DANCE in it. ****ing AS ****. that MF item...***ing requires you keep critting now does GP sound like a guy who's dumb enough to use sword like a hero? naw man. the sword is just to fool people into thinking he's a melee champ. ka-ping!!!! u dead

critplank so much better than tankplank..... but that makes GP a ****py champion.

i guess jungler going to tank or support. Way to burden your teammates with less tanky options to add one more ADC.

Why do i like tankplank better?

i haven't tested it. good commentary.

Looks like a solid guide, but with the masteries, you took the bonus 6% armor and MR, yet you hardly (if at all) build either of those in the build. so why not take the health regen? i mean obviously that would be better if you weren't going pure damage.

Really good guide! There are a few places where it looks like you messed up on coding. Sometimes you try to link to items that are either misspelled or missing parts of the name (i.e. Corrupting Potion will link, but Corrupting will not link). Also, at the very end of your guide, I think you want "[*]You!!!" instead of {*]You!

Something else you should consider. With the changes to Essence Reaver, you now gain 30% CDR from that item and one other crit item. This means that in your example final build, you have 60% CDR, and with your scaling CDR runes, you have 75% CDR, so 35% CDR is being wasted. I would swap out Youmuu's Ghostblade for some other offensive item and Ionian Boots of Lucidity - Homeguard for some other boots. Boots of Mobility - Distortion provides similar stats. You gain extra movement speed whenever out of combat, not just when leaving the fountain, and your Summoner Spells will receive 15% CDR instead of 10% and receive additional movement bonuses after their use. Or you could use some other type of boots. You should also probably exclude the Glyphs of scaling CDR because you have so many options for CDR from items.

So fix up the coding and the overload on CDR, and you'll be good to go.

Nice build. It makes a lot of damage.

Very thorough guide. I'd be interested to see how you think he fares against different top lane champions.