Gross square foot (GSF) is a measurement that represents the total floor area within a building, including all usable space. It encompasses not only sales and display areas but also storage, offices, and any other enclosed spaces. GSF is a key metric for retailers and property managers, helping assess the overall size and efficiency of a retail space. It is often used in evaluating property value, determining leasing costs, and optimizing the layout of retail establishments for maximum utilization of space.