Unlike human subjects’ research training, not everyone needs to complete GCP training, even though they may have contact or interactions with research subjects or with their private, identifiable information. The requirement to complete this training is usually determined by your funding source. All investigators and staff who are involved in the conduct, oversight or management of NIH-funded clinical trials are required to complete training in Good Clinical Practice (GCP) and refresh this training every 3 years, consistent with principles of the International Conference on Harmonisation (ICH) E6 (R2). Information on this training requirement can be found here.
Other sponsors may also require this training; you will need to check with the sponsor to see if they have specific GCP training requirements.