What is the Impact and Potential of each employee? The GC Index is a unique assessment tool that measures how individuals and teams impact and contribute to a Business. The GC Index is the world’s first Organimetric – connects people and businesses with data that organizations can use in all of their business processes and business decision-making. It helps people articulate where they want to make an impact and contribution to a role/team/organization (and where they don’t), enabling Leadership Teams to align their organization to the business objectives.