The only expectation is, like ANY role, that the person (or persons) are qualified to perform their job. If someone is delivering GMP training, it would be expected that they have sufficient expertise in GMP to deliver the material. If someone unfamiliar with GMP is just clicking through a slide-show, the training will not be effective.
Through GMP training your employees may find opportunities in which to improve functional and operational processes resulting in improved productivity and cost savings.
You can get more information on QualitySmartSolutions regarding GMP Training. They are a GMP training solutions provider for getting GMP Certification.