I was in what they called GT at my school through elementary school (didn't care about the last "test" when I hear the higher grade's gifted classes weren't as interesting) and it was a nice experience. I'm not sure if it was helpful for me overall though. My GT teacher made sure that no one thought it was for "smarter" kids, but for people who were just bored with the regular classes and did well in them. Even though my GT teacher tried to keep that public image, everyone *did* still think the class was a sign of some cognitive superiority. Me noticing this categorization, I think, caused me to put less effort into actually working with and toward better problem solving skills because "I'm smart. I can use that to carry me through everything, right?"
So now, after trying to define intelligence, I only think that it's something that shouldn't be my metric of self worth. This is mostly because, even more than a great deal of word-concept associations out there, what "intelligence" actually *is* is a very fuzzy idea. The clearest definition I have for it based on what I think other people associate it with and are trying to convey with it is this:
"The ability to understand things/concepts/whatever." Though understanding is a very subjective thing, so I'm not sure on anything anymore. Good night.
PS: Do I get some medal for giving my mandatory definition of intelligence?
PPS: As a side side note, in GT, one year we learned about philosophy and their philosophers. After learning on this later, I realize that (surprise) I didn't understand squat from it. I think it gave me some unconscious framework of understanding to learn it later though, maybe. Seriously, we were being thought Platos' forms in like 3rd grade or whatever.