How long are you going to keep GP strong in every game phase?

It is just beyond my understanding how can you keep him so strong and give him 0 flaws or means to counter play him.

How lane vs GP as meele looks like. He spam his Q taking away nearly 100 of your hp each time. It has non existant cooldown and no mana cost. You can just spam it 10 times early and you still have over half the mana (though why spam 10 times. with that damage you literally kill enemy laner before you hit those 10 Qs).

lvl 2 or 3 depending on what GP takes, you either get zoned off farm completely with his barells that have aoe dmg with nearly to no delay (unless you literally dont come close to creeps or have a mobility spell forget about dodging it) and of course your armor, even if you have taken it early it won't matter since his barrels penetrate 40% armor by default. But that is the beginning because his barrels also proc sheen effects for all aoe dmg.

Do you want to gank gp? You can forget about this one. The moment you stun him he just goes for his very healthy QSS with basically no cooldown as well plus heals for missing health additionally. And even if he misses the barell while escaping he gets huge movement speed boost so you can't even chase him down (enjoy it even more after he gets phage and trinity as killing barells and hitting them triggers movement speed passive from these items). He can go back to safety with ease even after crossing the middle of the top lane.

People were complaining about Ezreal abusing kleptomancy? Well here you have an easy point and click ranged ability that procs it. So by poking you down for free he gets free gold, plus can get usefull consumables as well as vision and gold sacks which combined with his bullsht Q passive that gives him bonus gold is just completely obnoxious. Its really fun to see GP getting triforce so early considering this item is the most expensive item in the game. And even if he doesnt kill you in lane it doesnt matter. He can just ult here and there with his global huge aoe "let me get that free juicy gold from kills/assist" and come back to lane with even more items. You literally have nothing to say in lane vs gp. He doesnt need to come close to farm and risk anything. You can literally have no hands and still play him succesfully and win over 60% of the games solo carrying. You zone people by literally existing in the game because once enemy tries to collapse on you there is full line of barells ready to pop off. Also the whole idea of barells having no mana cost is just dumb. He has no mana costs already and you gave him free spell anyway. He should be forced to use his brain before using barell not spamming it brainlessly with no punishment to perma zone people or get free passive proc on towers. This champ was like twitch or jayce too strong for last 2 years. His kit is so overloaded on par with champs like yasuo, zoe etc.

Remove armor penetration from barells. He already builds lethality. No need to give him free penetration. Give him mana cost on barells. like 40 mana. He has already 0 mana costs. After buying sheen he can also spam the hell out of his W as well. You can literally spam his spells off cooldown and never run out of mana before forcing your enemy to go back to base and heal up. Remove heal on his W. QSS is strong enough itself. No need to make it even stronger. Give him more meaningfull mana costs or increase cd on his Q early. Instead buff his ult in a way that the damage is amplified if more champions are hit with it, so he actually is a teamfight late game champion that needs to scale. Right now he has late game even faster than adcs that already get their items too fast. We all see what happens when champion who gets his power spike with cheap easy to obtain items gets them too early - see Ezreal. He usually spikes around mid game and falls in late, which was why he was much weaker than crit adcs. He was getting outscaled, but now he gets klepto and hits his powerspikes so soon that its really hard to stop him unless your team stall hard or his team is really bad. So nerf gp properly. Give him weak laning phase that will actually justify his damage in late and make late game actually be in late not earlier especially for him. Instead give him better teamfight power packed to his ultimate as I mentioned. Also you can give an additional bonus to damage if he hits his barell into people that stand inside the ultimate.