I don't want to derail Grace's thread with this but...
I hear the words, but I can't really relate to this way of looking at things. I don't think I'm very normal at the best of times, so perhaps that explains it (that's not being negative, I like the way I am). Because of that I don't think this is a useful topic of discussion unless there's anyone else out there who shares the way I think. Since I've already written it, I'll leave the rest here:
I think of GCS as being a very personal thing and what it means depends on the individual. I want it solely for me, because it would make me happy, and its got nothing to do with transitioning. It wouldn't make transitioning easier to harder, or anything really. It certainly wouldn't make transition complete, unless it actually was the very last thing to do, but that's only complete in a very technical sense. I guess it could be good for people if it they can look at it as the point where they were finished with being trans, because I'd certainly like to put all this behind me.
Compared to HRT and social transition, GCS is very different for me. HRT makes me feel normal. Social transition scares me and I don't think I have much (if any) social dysphoria.
I tend to think why not? The risk for me is family. It might not go down too well, and I've so far avoid all that by not socially transitioning. Detransition? Not applicable, but even if it were I don't see what transitioning has to do with GCS (detransitioning because of not being trans would be an issue, but I am trans). Regret? Can't imagine it.