I obviously agree full stop with Gifted Giorno/Bruno, they have excellent tactical skills, are able to strategize on the fly, can out think experienced and skilled mobsters and figure out ways to defeat unique opponents they have little to zero experience with, can utilize their abilities to great extents in a multitude of ways to help them in any given situation.
Not only that but Giorno in particular has a advanced grasp on biology, flora and the like, which he uses in full to make the best use of his ability.
But that's without even getting into the fact Giorno, in just one week, managed to overthrow the largest criminal organization in the country, and then goes on to quite literally run it with him as the head of it. At the age of 15. Giorno is also sly and cunning, he's adept at tricking people, manipulating them and fooling them into doing what he wants. Hell it's how he made a living for awhile, but he's done so in fights as well to get an upper hand, see him baiting Ciocolatta and stalling time while lying through his teeth.
Bruno must be given credit as well, as he made his way up to capo, which would have include a bunch of trafficking, protection, gambling and casino management, given it was specified that's what he was given, not withstanding he was Polpo's go to man for a good reason.
Point is, simply based on their ingenuity in a fight I'd say they're gifted, but coupled with actual backing in other categories? They're definitely warranted that. Only thing they may lack is booksmarts, but given Giorno/Bruno's surprise knowing of various information, especially animals and biology with Giorno, that may not inherently be the case.
Also him getting one over on Fugo, who has a genius level IQ, is just another thing to toss onto the pile I suppose.
Now, for the durability? I did mention this last night but there's a issue here, that we need to figure out first.
And that's Green Day's AP scaling.
It's more along the lines of, it's hard to tell if he (Green Day) even scales to GE begin with. I mentioned that there is a single interaction between GE and GD, with GD attacking Giorno but GE blocks the pummel, but they get sent flying, that's literally it, being sent flying doesn't inherently mean GD scales to him, see Saitama and Kabuto for an example.
But There's some blood though when he gets sent flying after being pummeled, which is where the issue is, IF, that blood is from GE being attacked by GD, then GD scales to GE, straightforward.
But if that blood is from something else, like the chest wound he got (In the anime the blood is explicitly from the previous wound, in the manga it's impossible to tell), then we don't have enough evidence to say GD scales to GE given a full pummel didn't actually break the guard from what we can tell so it ain't like he actually overpowered GE and if he didn't hurt him either? Then his bets feat is launching a dude which is like 9-C, maybe 9-B lowend.
Basically, in order for Green Day to scale to GE, we need to say that the blood that was sprayed when Giorno got launched by him, is from being GE being damaged from GD, and it's hard to tell if that's the case in the manga, it COULD be what happened, but it also could just be blood from previous wounds like in the anime.
If anyone has an input on this, it'd be appreciated.
Personally, I'd just say Possibly (low end) Building level for Green Day due to the ambiguity of the scene, hence the possibly, and then rate Giorno's durability as At least Street level (Feat here), possibly Small Building level (Survived attacks from Green Day, albeit with heavy damage), possibly higher (could be removed if that's redundant or unsafe).
Small Building opposed to Building level due to the fact that, those Green Day attacks ****** him, badly, he wasn't punched clean through or torn apart or made into swiss so he clearly had some decent durability, at least enough to save him from complete death, but it's also true that Green Day is drastically above what Giorno can comfortably tank. Ergo, we take whatever Green Day is, and just heavily backscales Giorno off it, Green Day is lower end 8-C if we scale him to GE (he's probably a bit less even then due to failing to break the guard even with numerous attacks) so a fraction of low end 8-C would just be 9-A.
Hence, if GD is possibly lower end building, then Giorno would be possibly small building.
Or something like that, just my thoughts on that, I'm open to opinions though in regards to the durability backscale, as well as if GD even scales to building off GE to begin with.
Here's the relevant scans and video.
GD vs GE in the anime.
Manga.
And yes, that's literally it for GE vs GD. There is
one other feat for Green Day but it's off panel against Sex Pistols, who we do rate as Building level in durability, but they're gonna be tweaked eventually, at least to an extent so it's better off we don't bring them into this yet.
tldr, do we even say GD is 8-C or not? If he is, Giorno can backscale off him to like 9-A, maybe higher. Or something along those lines.