I'm no expert, but I'll take a stab at answering your question...
I think there's a theory that some GT kids are GT in part because they take in so much info so quickly. That makes them more aware--more sensitive--to everything around them. Including their socks. Processing all that information can be overwhelming to them, and it can cause problems. They aren't good at selecting what info is important and what info is just a distraction.
Personally, I have certainly seen more GT kids with sensory integration issues than I have non-GT kids. By a lot. That's totally unscientific though!
