Identity formation is particularly challenging for stigmatized minorities. The minority stress model (MSM) posits that both negative stereotypes and their internalization represent stressors. There is evidence that this applies to the gifted, too. However, their status is ambiguous, given that both negative and positive stereotypes exist. Furthermore, individual wellbeing also hinges on one's identity stage, as outlined in the Cass identity model (CIM). The CIM was applied to gifted identity development in a survey of 742 high-IQ society members (16-79 years). Identity stages could be reliably and validly assessed with a new measure and were related to adjustment and coping as expected. Latent class analysis revealed four groups, which resembled the CIM, but with a few notable exceptions. Ordinal-logistic regression showed that years since first suspicion and since diagnosis of giftedness predicted group membership. In sum, identity development in the gifted examined here shows similarities with the CIM stages (which are differentially related to wellbeing and feelings toward one's own giftedness) but has its own specific characteristics, too.