I would never say that you're failing to properly support your HG child even if you go so far as to let them sink or swim academically as long as you are providing a stable home, consistent parenting, and love.
I would teach My child in your scenario all about "the devil in the details" by seeing some of her projects through and pitching in and picking up the slack to make it work, visibly showing by example all the blanks she'll need to start filling in sooner or later. Just because I have too much time on my hands and I think that kind of stuff is fun.

Youth lives by personality, age lives by calculation. -- Aristotle on a calendar