Cause he can bully you with Q, even harder if he has Grasp, and barrels are undodgable if you dont have a dash. Even if it was weak, he just abuses Exhaust for a safe lane regardless + his W gives him sustain and makes it even harder - borderline impossible to all in him and capitalize on his "awful laning phase"...
qViolet5 votesHis laning phase isn't terrible, but it's not strong. He can trade evenly with a lot of top laners and in certain matchups he's even favored. He's often weak against gap closers because while he's decent at trades, he's very bad at extended fights, which a lot of top laners, or at least the kill lane top laners are good at.
In terms of mid, he's not good. GP's weakness in general are ranged champions as they can contest his barrels with a lot more safety, and the can poke him because he's melee. GP is fine though. Mobile assassins are the only ones who can get kills on him, whereas the others can just deny him, but a good GP should be able to farm in most cases.
Asayake 5150glow1 votesHis laning phase isn't terrible, but it's not strong. He can trade evenly with a lot of top laners and in certain matchups he's even favored. He's often weak against gap closers because while he's decent at trades, he's very bad at extended fights, which a lot of top laners, or at least the kill lane top laners are good at.
In terms of mid, he's not good. GP's weakness in general are ranged champions as they can contest his barrels with a lot more safety, and the can poke him because he's melee. GP is fine though. Mobile assassins are the only ones who can get kills on him, whereas the others can just deny him, but a good GP should be able to farm in most cases.
It's also a lot harder to barrel ranged champions because you often need to chain them quickly because they're further away.
Penns1 votesIdk I played Talon or Fizz mid against GP a few times and I could never kill them early unless they fucked up.
Just his passive auto + Q and minions with 
almost outtrades my W-ranged Q-passive with 
on Talon, then he also has ranged poke, good sustain and Exhaust... how am I supposed to kill that in lane? lol
Troll for Trump1 votesYeah Talon you just need some help from the jgler, but, your roam is much better than his. You get 1 kill on him with or without help from jgler, start roaming, and get fed to the point where you can dumpster him. You know he won't leave lane, and will, at best, send his ult out.
Over Innsmouth3 votesbarrels are undodgable if you dont have a dash.
Are barrels invisible to you?
Penns2 votes? Cant attack them cause Im melee and its pretty much a 50/50, cant dodge a double or triple barrel unless I stay a whole screen away 24/7 once he puts one down and get zoned by the champ with a "bad laning phase" xd
Over Innsmouth2 votescause Im melee
I'm assuming you're talking about Fizz so I'll use him as an example.
Playful/Trickster has a base cd of 18 seconds. You can go Untargetable every 18 seconds without having to max it first.
Gangplank's Powder Keg has a base recharge time of 18 seconds (and Gangplank usually ranks this skill second), meaning that for the entirety of levels 1-10 he needs 54 seconds (43 seconds with 20% CDR) for a triple barrel combo, and 36 (28 seconds with 20% CDR) for a double barrel.
18 seconds is lower than 54, 43, 36, and 28 seconds. Every 18 seconds you get a dash that doubles as an Untargetability. Unless Gangplank is hiding barrels in bushes (which is still really easy to spot if you just watch for the animation when he places them), you shouldnt have any issues ignoring Powder Keg.
On the other hand, if you're not referring to Fizz that means you should be able to adapt to playing other Champions, and could easily pick up one of the many, many top laners who invalidate Gangplank with their all-ins.
Simkunt2 votesBecause any all in champ can shit on him. I mean i play top as a offrole jax and renekton and i shit on every gankplank and im dia 3 elo. He is extremly weak in the all ins. If you ever get a advantage on him you can just farm/xp deny him and if you ever get him to 50% hp its a easy dive. As a gankplank you can never mess up against a good player or they will destroy you. Since i as a offrole toplaner can shit on gankplank mains a fiora otp etc should just deny him entire game.
RexSaur2 votesHis lane is not strong, but its not weak either.
In fact its probably too strong for his scaling, like if he wants he can stay at his tower and spam barrels, its pretty much uninteractive lane.
Prison AnaI1 votesHis mid laning isnt as terrible as who tf plays tanks and divers mid but if they take him top he legit loses lane to EVERYONE. Unless he already has barrels down hes not getting anyone off him. All it takes is a slight exp lead and there is nothing he can do vs 99% of top lane matchups
GayFluffyUnicorn1 votesIt's quite the opposite. Midlane GP=pretty much trash against any meta midlaner. Toplane: functions well in everyone except jayce, rumble, panth, quinn.
Troll for Trump1 votesBecause the only way he can kill you is if you dive him or go too ham