The point being spectacularly missed here is that all the perceived issues of G & T children - whatever their "level of giftedness" are issues that ALL children could suffer - they arent unique to G & T children and to suggest otherwise is utterly bonkers.
Bullying occurs where an insecure child picks on another that he/she sees as vulnerable. It's not that all bright children get bullied. It's not that all children who wear glasses get bullied. It's just children who are vulnerable - for whatever reason - be it social or physical or emotional.
Boredom at school can be an issue for children who cannot get to grips with what they are being taught as much as those who have seemingly "been there, done that".
Some children - whatever their IQ - will have problems with social integration. Some children - whatever their IQ - will have problems with finding things that interest or challenge them.
Putting a child up on a pedestal and perceiving them as difficult or a challenge to be conquered is doing them absolutely no favours at all - and it really doesnt take a genius to work that one out.