100% male now... nice one too...
I have one that has as much color as yours, minus the orange trim on tail... mine is kinda dull....
thats why I think GTs are one of the hardest fish to sex at a young age.... I posted mine when it was around 2.5 inches, the overwelming response was female... a few months later he had pointed fins and was developing a lump... a few months after that he and the other GT laid eggs and had some fry swimming....
nice fish though...