This build is not for novice players. GangPlank is currently an extremely well rounded champion. With the changes to grog soaked blade, his passive, and whole rework in general, hes truely a good utility bruiser, so that's what this guild is building him around. By mid-endgame if you havent gotten much farm, your gp10 items will make up for that, and you'll be gaining cs easily because of your rune/mastery/inital item build. Plus adding more incentive to walk into melee range. And if you are fed, you're not a glass cannon and easily shut down.
Try to solo top. if you cant. take middle. that's the best way to optimize this build. You're basically a good utility high movespeed trinity force offtank.

For Runes i take Arp marks, Mana Regen per 5 (per lvl) seals, for your early game. MR per level glyphs because coupled with merc treads, you're very beefy against mages, and movespeed quints. the arp is just for some extra physical dmg, the mana regen is nice, because it will tide you over late game, and let you spam more early game. and if you know what a Kenyan is, well, you shouldnt need to ask about quints.

i go 0/21/9 taking strength of spirit 3/3 one point in defensive mastery, and harden skin, and a point in utility mastery this choice gives you a lot of extra beefyness early, mid, and late game. which is a lot of what you're building is survivability, and utility.

The build i have depicted is the cookie-cutter build for KenyanPlank, of course if you're getting fed, or they're low on mages, or AD, you can exchange some items, just make sure to have boots, Shurelya's, Rands if they have at least an ad, aghostblade, and trin force. its not a bad idea to trade in boots for a phantom dancer if your dmg is lackluster, or their team is low on cc, and the force of nature is easily exchangeable with a bloodthirster for low ap teams. or even starks, for high ad teams on your side. starks goes very well with gangplanks Raise Morale. But feel free to tweak the build how you like, i crit 600-700s on people, then there's ghostblade active, and crit+trin force procs. you have some good burst, good survivability. and 2 escapes, an obnoxiously high base movespeed. and both of your escapes are aoe. so, your team will be enjoying you if you know how to use actives properly.

R->W->E->Q is the skill order, Dont be afraid to use your ultimate to farm creep waves or save towers, its a nice low cooldown, your remove scurvy is your most important skill in lane. no cc, low mana cost, obnoxiously high heal, your raise morale is almost as good, but you want the heal for the nice survivability. since you want to solo top->midding->laning normally. Most people would max Parrrlay, hope for a crit, and exhaust flash for a kill, you dont need lucky crits if you build beefy. max Parrrlay last.

I take exhaust and flash as summoner spells, but i mean its pretty much preference, take ghost if youd like to compliment the build, which is what ive listed,but movespeed drs around 550 or so, and around 230ish not sure of the exact numbers. Another thing to think about if your team is good with positioning teamfights is going 21-0-9 and taking rally, the active could be pretty nice when used well. Just dont pop everything all at once like an idiot, Rotate actives. It's much better for you, and your team.

Use Shurelia's to get good positioning pre-fight or chase post-fight
Use Ghostblade for deeps (obviously) or tower pushing, dont forget that
Use your active (Raise Morale), Dont forget about it, it can be the difference between your bruiser getting out alive or not.
Use Randuins to escape from a fight, just like any tank would, dont be afraid to pop it immediately into a fight against a fed yi or ashe though.

If you're planning on tweaking this built and jungling the new flavor of the month "jungleplank" wriggles into gp10 items into build pathing. theres no point to skip the gp5 if you're going for all of those items, even if they're terribly itemized (which they are, thats why they give gp10 :P)

Pros
-You dont die easily, and are a bad focus target, but can still help your team a lot if not focused, in the forms of damage, and support.
-You do a good amount of damage, better then a warmogs frozen maller atmas ranged carry at least. but your burst is luck.
-You're very obnoxious, and hard to catch in the first place. so backdooring, supporting, tanking, or even just straight deepsing.
-Gp10 items give you some nice farm if you play effectively
-You get to do something different :D
Cons
-You're not invincible, just saying
-You have a lot of actives to keep track of, keep your Raise Morale in mind as an active too.
-You're not a glass cannon, so if you're doing par or subpar, you will be criticised.

All in all im pretty happy with this build, i use it a lot, its not half bad for trolling some normal games up either. I havent taken it into ranked yet, but i will post results about it when i do, good luck, enjoy being Sonic the Hedgehog. Oh, and no one knows what this means, but ill post it anyhow (<3MLW). :D