This pilot study investigated how engagement with computer games and TV exposure may affect behaviors of gifted students. We also compared behavioral and cognitive profiles of twice-exceptional students and children with Attention Deficit/Hyperactivity Disorder (ADHD). Gifted students were divided into those with behavioral problems and those without, based on teacher ratings of classroom behavior. Both gifted students and those with ADHD completed standardized tests of IQ and working memory. The findings indicated that gifted students displayed similar oppositional and hyperactive behaviors as those with ADHD, but did not exhibit similar levels of inattentive behaviors. Despite the similarities in behavioral profiles, the gifted students performed significantly better in the cognitive tests compared to those with ADHD. Playing computer games and watching TV showed a trend in predicting inattentive behaviors at home, but not in a classroom setting. We discuss possible applications of computer use for maximizing learning and maintaining motivation in the classroom.