Welcome! 
 While gifted kids can be markedly different than their chronological age peers, and in reaching their 
milestones can show 
asynchronous development, they may also, at the same time have a learning disability. When this occurs, the kids are called twice exceptional or 
2e.  IMO, some of the saddest stories are those in which a kiddo's "quirks" were dismissed or accepted by parents until the child was older and struggling (socially and/or academically and/or with organization and/or time management). I say sad because if these "quirks" had been correctly identified as a learning disability earlier, there are many remediation helps and accommodations available to assist these kids with their development.    
Please keep a watchful eye on your child's idiosyncrasies, in case some of the traits may indicate a future need to have  testing/assessment for not only giftedness but also for potential learning disabilities.