If you have a “disorder” then I would consider you to be unstable.
Actually, the term “gender identity disorder” is a misnomer, and is no longer used. The DSM V has replaced it with “gender dysphoria,” because, as the APA states, “replacing ‘disorder’ with ‘dysphoria’ in the diagnostic label is not only more appropriate and consistent with familiar clinical sexology terminology, it also removes the connotation that the patient is ‘disordered.’”