My son was diagnosed with autism at age 2.5. By the time he was 7 he was identified as profoundly gifted as well. But having the early dx and starting early speech, OT, and especially ABA helped him become communicative. My son knew numbers including zero and negatives so I didnt understand how he could be autistic, too. Just like your son, he knew colors (weird ones like maroon and magenta) but I couldnt get him to say "red." Lots of therapy helped him speak and communicate instead of scream and grunt so that now he is thriving!

The therapy wont hurt and you will be so happy to hear him talk! I used to dream about my son talking to me when he was minimally verbal, and now he is a complete chatterbox!

Kate