I think it depends on what you want from the word "gifted".
Is he smarter than the average bear? Yes. Bright and curious? Probably; if he didn't show some signs of being potentially gifted you wouldn't have tested him. Do you have to switch things up and work a little harder than some parents to keep him on the top of his game? Most likely. But then, my guess is you knew that already.
Is he going to be a top student when he gets to school? Possibly, but it depends on a lot of things, some of which won't be made apparent by any test. Does he qualify for a school gifted program? Possibly. (Not in my county's school district; the cutoff is 130.) Is that automatically a good or bad thing? Again, depends on your school system.
My youngest is 2e; she has some ADHD-ish issues along with being autistic/Asperger's/whatever you want to label her as. While we were homeschooling, it made not a bit of difference; the family joke is that she has educationally-induced adhd. It's manifested differently even from class to class; she obviously doesn't have problems losing homework when it's done online via Moodle, though she may forget to write it down in the first place. But she's 14. When she was three, she had excitabilities and lacked attention at times and was generally a disorganized little mess...but so were most of the kids in the three year old class, including her neurotypical twin. Before you decide to look for answers to a possible adhd issue, be sure there's really a question, and that you're not (and preschool teachers are not) just expecting a higher level of functioning from him because he's bright.
