Are there prerequisites? How should I prepare?
CGCT has no formal prerequisites. Relevant field experience helps, but you do not need a prior AGSI course or certificate to purchase eligibility or sit for the exam.
CAGST requires active CGCT before you can purchase or sit for the advanced exam.
Optional free prep: /study (guides and practice) and the Book of Knowledge. Prep products do not grant a credential and are never required.