The Greener Golf Index (GGI) is a comprehensive, systems-based evaluation tool that establishes a transparent, objective, and dynamic framework for measuring the sustainability of golf operations. It is designed to support golf courses in understanding their environmental, social, and economic performance through science-based assessments across key areas of the course, such as water usage, turf health, energy efficiency, chemical inputs, and biodiversity. The goal of the GGI is to offer clear, actionable insights that help management care for their course more sustainably, without sacrificing playability or character.