Final answer:
Gerard is considered a functional manager due to his specialized role in managing only the human resources department within the organization.
Step-by-step explanation:
Gerard, who is responsible for the management of the human resources department and no other organizational activity, would be classified as a functional manager.
This is because his management responsibilities are specialized and focus on one specific organizational function.
Functional managers are typically experts in their field and are responsible for the efficiency and effectiveness of their area, often working to optimize their department's performance, manage teams, and ensure alignment with the organization's overall strategy and objectives.