For what it's worth, the tester who tested DS8 (who presented with a lot of autism like traits when he was younger, such as rigidity, rituals, anxiety, low coordination, sleep issues, social awkwardness, some mild stimming behaviours, but NOT the central features ie mind blindness and lack of empathy) that many HG+ children appear to have autistic traits because of their extreme need for logic in their lives, which makes them try to apply that logic in all walks of life including emotions and social interactions.
What you describe to me sounds more like an HG+ child who is 2e (with an ASD or maybe dyspraxia). While there are plenty of HG+ 2e kids, there are others (such as my DS) who have never had these traits... who, if anything, trend the other way (highly coordinated, unusually flexible, etc.)
As I understand it, it is not that the intuitive and emotional pathways for understanding social interaction are not accessible for them as they would be for autistic children, but that they prefer trying to make sense of the world using other pathways which they feel more comfortable with. If you look at it like that, it makes sense that they can learn how to apply these other pathways as they mature, which makes them look as if they had outgrown autism.
As far as I know, there is no such thing as an emotional pathway for understanding social interaction. Obviously, social interactions come more easily to some kids than others, but that is more likely due to a variety of factors (some of which may be rooted in neurological differences). It is also not uncommon for a child with ASD to "grow out of" autistic traits as they get older and learn to compensate more effectively. But you can't grow out of being autistic any more than you can grow out of being gifted.
