Chiming in from Gifted-Land:
Most gifted kids HAVE disorders (as a matter of fact: most people in gifted-land are on a steady campaign to get giftedness recognized as a spectrum disorder in and of itself, like ASD). But, again, most gifted kids have disorders of various types. Ranging from SPD, ADHD, Aspies, OCD, Asymmetrical Development, etc.
NAMING a thing... Whether its giftedness (and here's PART the spectrum: Gifted, Highly Gifted, Profoundly Gifted), ADHD, SPD, artistic, musical, analytical, et cetera... Doesn't alter a thing.
Its still the same as it always was.
It simply has a name.
And with a name... Common characteristics, strategies, community, etc.
Giftedness is a social construct with philosophies & practicalities AS MUCH as every other.
And as with every other disorder... It exists across all societies & cultures regardless of whether or not its named & recognized, and whether or not its helpful or problematic.
Just a thing to keep in mind as you walk this road.
Labeling can be a GREAT thing.
Just a moment ago, with your 'Aha!' Reaction... Stumbling across a shared characteristic trait set of other kids that match your daughter... That's 100% because of labeling, organizing, sharing resources/troubles/strategies.
...
A lot of people are very prejudiced (even bigoted) about the idea of labeling and evaluations... Right up until they need help with their kid... And even then, many refuse to get the help that would make life amazing, Aha!, extraordinary... Instead of a constant challenge.
Even more people have to suffer through other's bigotry (claiming the "don't believe" in blah blah blah ... Because with THEIR kid al they had to do was blah blah blah).
If you have a gifted kid, you have my condolences... Because its not an easy road to walk. It can be an adventure, for sure! But its not easy. There is an awful lot that parents of neurotypical kids will never have to go through, get, or understand. BUT please, please, please... Don't be one of those parents making life hard for other parents by waving away & dismissing anything outside of your own normal. Sure... They're social constructs. Doesn't mean that they're not a great many people's reality. Including yours, if youve got a gifted kiddo.