11:19 here
Just think about what it really means for a kid who thrives at an HGC: sitting in middle school, which is bad enough as it is, through SIX HOURS a day of classes well below his/her desired level of challenge, possibily stigmatized as the "nerdy smart kid."
The hard question is: can that be balanced by extracurriculars and a shorter bus ride?
It's a tough question. IMO, better to try for a magnet and, if the kid really hates the bus ride and misses the classes, the local MS is always an option.