Gangplank the Saltwater Scourgehttp://images2.wikia.nocookie.net/__cb20091218194603/leagueoflegends/images/f/fe/GangplankSquare.png
Cost 3500IP or 975RPSpells -
(Passive) Grog Soaked Blade (Innate): Gangplank's basic attacks apply a poison debuff for 3 seconds that can stack up to 4 times. Each stack deals (3 + [1 x level]) magic damage per second and slows the target by 7%.
Ability Description Leveling up
Parrrley(Active): Gangplank takes aim and shoots an enemy with his pistol, dealing damage. If it kills it, he gains extra Gold. This ability can critically strike and applies on-hit effects, including his passive.
Cooldown: 5 seconds
Range: 625
Cost: 40 / 45 / 50 / 55 / 60 mana
Physical Damage: 20 / 45 / 70 / 95 / 120 (+1.0 per attack damage)
Extra Gold: 4 / 6 / 8 / 10 / 12
Remove Scurvy (Active): Gangplank consumes a large quantity of citrus fruit, which removes all crowd control effects on him and heals him.
Cost: 65 mana
Cooldown: 22 / 21 / 20 / 19 / 18 seconds
Heal: 80 / 150 / 220 / 290 / 360 (+1.0 per ability power)
Raise Morale (Passive): Gangplank's attack damage and movement speed are increased permanently.
(Active): Gangplank fires into the air, disabling his passive boost but inspiring himself to gain additional attack damage and movement speed, with nearby allied champions receiving half that amount, for 7 seconds.
Cooldown: 25 seconds
Cost: 60 mana
Radius of AoE: 1400 (estimate)
Cost: 50 / 55 / 60 / 65 / 70 mana
Passive Attack Damage Bonus: 8 / 10 / 12 / 14 / 16
Passive Movement Speed Bonus: 3 / 4 / 5 / 6 / 7 %
Active Attack Damage Bonus: 20 / 28 / 36 / 44 / 52
Active Movement Speed Bonus: 14 / 18 / 22 / 26 / 30 %
Cannon Barrage (Active): Gangplank signals his ship to fire upon target area for 7 seconds. Each cannonball deals damage. Enemies caught in the area of this ability are slowed for 1.25 seconds, duration refreshing if one stays in the area.
Cost: 100 mana
Range: Global
Radius of AoE: 575
Slow: 25%
Cannonball Area of Effect: 275
Cannonballs: 25
Magic Damage: 75 / 120 / 165 (+0.2 per ability power)
Cooldown: 120 / 115 / 110 seconds
Runes-
I currently got a quite random runepage.
Basically got 9x crit dmg red. 9xhealth/lvl seals. 9xcrit dmg glyph. 3hp plain quints.
I guess you could switch your seals to armor if you want. And armor pen marks. That would prob a g00d GP jungle page.
But I'm 2 lazy 2 spend IP on runes.
Masteries -
10/7/13
http://i54.tinypic.com/2cr0k08.jpg
Items-
Cloth armor, 5pots.
Madreds (small one)
lvl 1 boots
wriggels
berseker greaves
sheen
IE
Trinity
Then I usually go for w/e it's needed.. BT/GA/Warmogs/black cleaver/FoN/Atma's etc
Jungling-
I do start @ blue buff and then I gank.
REMEMBER, I could gank after blue/wolves/wraiths/golems. That really depends.
If I gank after blue I usually go top.
If I gank after wolves I usually go mid.
And if I gank after golems I usually go bot.
I do not take red. But if I don't gank during my first jungling, I get everything except red buff.
I do counterjungle 2 sometimes. That really depends on what we are playing against, what jungler they have etc.
Spell order-
Level 1 - E
Level 2 - Q
Level 3 - W
No matter what, I always get it like this.
Then I pretty much always go for R/E/Q/W.
Other-
I actually haven't played GP in ranked, cuz every single time since I started playing him (about 2weeks ago) he keeps getting banned. Played like ~20ranked games and no GP. :-(
But I will play GP once he's available and try this build. So remember, this is not a "high-major-epic-PlayThisInOnly2kElo" guide. You could use this in normal games.
I always, before I gank get my E up so I get movement speed (try to get my allied friends 2, so I could successfully gank).
Not much more 2 say, remember your passive, and your really powerful with red. You could kite a lot of champions.
Also, remember 2 KEEP YOUR W UP, do not use it during a teamfight randomly, save it wisely!
(protip: it removes the cc from malz stun, but not the damage) annoying shit is annoying.
And yes, I did start play GP cuz he's very overpowered.
Good luck & rage/gimme some feedback if you want.
Tossed this guide together fast, and I think GP will get nerfed soon so I'll update if needed.

Quoted for lolz if he edits this. I'm still gonna look back at this thread and laugh.