Garthwait Leadership Center | 449 followers on LinkedIn. The Garthwait Leadership Center (GLC) empowers Gettysburg students, employees and young alumni to lead ethically and effectively through our expertise in facilitation, coaching, and outdoor experiential learning. The Garthwait Leadership Center (GLC), through collaborative partnerships across the institution, creates intellectual and experiential opportunities for students and alumni to develop leadership skills. Through these experiences, students and alumni identify and reflect on their passions, and learn how to apply leadership skills ethically to make a positive impact.