On this site, "gifted" usually refers to "intellectually gifted." There are also gifted atheletes, gifted artists, etc. In addition, an intellectually gifted child may have a delay, in speech, gross motor, etc.
IMO, you can't tell if your child is intellectually gifted based on walking, and you can't rule it out based on talking. You also can't compare kids based on when they did either. I think you'll just have to wait and see.
Now if your child is READING at 7.5 months, I think you could make a case for giftedness.
