It seems I wasn't able to find specific job details for a Store Manager at GNC. However, typically, a Store Manager at GNC would be responsible for:
Overseeing store operations — Ensuring the store runs smoothly and efficiently.
Managing staff — Hiring, training, and evaluating employees to maintain a motivated team.
Customer service — Providing excellent service and addressing customer inquiries or concerns.
Sales and inventory management — Driving sales and managing inventory levels to meet customer demand.
Marketing and promotions — Implementing marketing strategies to boost store visibility and sales.
If you'd like more specific information or current job listings, just let me know!