Well, I am not sure if she is GT yet but my DD 22mo just started really talking with any regularity. Even with that she does not have 50 words yet. The prospect of ASD's was a significant worry for me as DH's brother has Asperger's & MR. Still, DD is so affectionate & communicative (even without words). For what it is worth, she is also hugely musical. DD was dancing before she walked & whistling at 18mos.
I was glad to see that there are other kids more interested in writing than reading. That is how my DS5 is. He has no interest in reading at all but enjoys spelling. Really likes to IM daddy at work too. What gets him started on words is fine by me.