Oh yes, that parent gut is powerful and deserves attention! And you bring up some good points about scholarships and wanting to allow her to problem solve and apply her knowledge rather than just continuing along in a regular school curriculum.
What does your DD say about the possibility of homeschooling? Do you think she doesn't feel as comfortable with the GT kids because of the particular children in her 5th grade GT group, which might be resolved with the particular 4th grade GT group, or is it more of a general issue? Does she still have friendships with her pre-skip friends?
Sorry I can't be of more help. When my DD9 had her 5th grade "graduation" ceremony, it made me accutely aware that she had "lost" two years of elementary school and that DD was growing up quickly. While I know that the grade skips needed to be done and that my DD is as happy as can be, it can be hard figuring out what is best, both long and short term. So, since I can't really help, (((hugs))).