I think it is a mistake to believe that all G&T children (or adults) have social issues. Some do, some don't. Sometimes it is probably related to the giftedness, sometimes it may be a thing apart.
Of course, there are some extremely well publicised examples of tragic geniuses but one tends to forget the ones that were not tragic at all. There is no evidence that Shakespeare or Virgil or Bach had social problems. They seem to have been well-integrated people who had no difficulty in adapting to society.
Mozart may have had social problems, but that doesn't make him a greater genius than Bach.
On a slightly more mundane level, I have met quite a few high-ranking academics in my day. Some of them are eccentric, some are not, but IME you cannot judge the genius of their minds from the level of eccentricity; some of the most normal-seeming ones turn out to be quite remarkable people and some of the mad-professor types don't actually turn out terribly good research.
I am all for offering support for those who have gifted children with problems and I think the G&T section is an excellent place for doing so; those who don't like it can read elsewhere.
But what I don't like about the section is the scare-mongering that goes with the idea that early development/giftedness has got to equal social problems. Then you get all these threads of 'oh dear my 1 yo ds knows more words than his mates, will he have problems integrating at school' (made up example, but the gist is there).
The reason I don't like it is that it's risky. There is such a thing as self-fulfilling prophecies. If you expect your child to have social problems you may end up creating them or at least augmenting them.
The other side of this coin is the idea that social SN=giftedness. So when you find a parent posting about ASD-like behaviour, someone will invariably pop up with 'oh he/she is no doubt very gifted'. Again, it does not follow. Many children on the autistic spectrum are gifted, but not all. And believing that your child has got to be gifted won't help if they're not.
But I have every sympathy with parents who need somewhere to talk because the giftedness and the problems seem so closely woven together. Let's be generous and offer any help we can.