GLA (Gross Leasable Area) is a term used in the real estate sector to refer to the total area that can be leased in commercial properties, such as office buildings, retail spaces, or industrial facilities. GLA includes all areas that can be rented, including office spaces, retail spaces, and other usable areas, but it does not include common or technical spaces such as hallways, elevators, or restrooms. This metric is important when evaluating and comparing commercial properties, as it provides information about the potential rental income.