gm_flatgrass is a minimalist map in Garry's Mod designed for open-ended experimentation and building. As the name suggests, it features a vast, flat grassy field with a single raised platform bearing the word "construct" in the distance, offering a simple and unobstructed environment. This map is popular for large-scale creations, vehicle testing, and physics experiments due to its expansive and empty space, allowing players complete freedom without any interference from environmental features. Its simplicity has made it a favorite for sandbox gameplay and creative projects.