gm_construct is one of the most iconic and original maps in Garry's Mod, designed primarily as a sandbox environment for players to experiment, build, and create. The map is set in a clean, industrial-like area with simple geometric structures, large open spaces, and water features. It includes several key areas such as a spacious open courtyard, underground tunnels, a flat water pool, and a central tower. Its minimalistic design offers players a versatile playground to test game mechanics, spawn objects, and engage in physics experiments, making it a foundational part of the Garry's Mod experience.