GFRG stands for Glass Fiber Reinforced Gypsum. GFRG panels are also known as fast walls. These construction panels are made of gypsum plaster, which is calcined and then reinforced with glass fibers. Glass Fiber Reinforced Gypsum panel It was first invented by the GFRG Building System Australia in 1990 for the purpose of building large-scale buildings. These panels have now found their application in India and other developing countries.