Gifted kids tend to have special interests as well and spend a lot of time thinking about them. I am uncomfortable w/ the trend I've seen on this board lately of people suggesting ASD every time a kid is described as somewhat quirky (probably mirrors the trend in our society as a whole--neuropsych thinks ASD is overdiagnosed lately and I see his point). Sometimes the symptoms are obvious, like the child is withdrawn, not doing any pretend play, lines things up for hours everyday, stares at the ceiling fan for hours, etc. and there is a concerning pattern, but in this case the symptoms could mean anything or nothing. Only way to answer OPs question is to have her child go to someone reputable and qualified who can diagnose these disorders (although DSM criteria/checklist for ADHD is very simple to find online, so people can get an idea of whether it's even a concern).