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HOME/USEFUL GUIDES/GUIDE TO 3D FILE FORMATS/GSM FILE FORMAT EXPLAINED
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GSM File Format Explained

The GSM file format is the library part format used by Graphisoft's ArchiCAD, a BIM (Building Information Modeling) software. These GDL (Geometric Description Language) objects contain 2D symbols, 3D geometry, and parametric data used primarily in architectural design and construction documentation.

IconExtensionOriginal SoftwareYearPrimary IndustryGeometryUV MapsTexturesPBRAnimationRiggingOpen Use
GSM Icon.GSMArchiCAD1987Architecture
Engineering
Construction		Parametric✔✔–✔––

GSM File Format Details

What It Stores

GSM files store parametric 3D geometry, 2D drafting symbols, and object data such as manufacturer information or fire ratings. They utilize GDL scripts to define how an object behaves when its dimensions or materials are modified by the user.

Primary Use Cases

  • Distributing architectural components like windows, doors, and furniture.
  • Creating intelligent, parametric BIM library parts for ArchiCAD users.
  • Standardizing manufacturer-specific building products for digital construction.

Strengths

  • High level of parametric flexibility via GDL scripting.
  • Lightweight file size due to script-based geometry generation.
  • Stores both 2D and 3D representations within a single file.

Limitations

  • ArchiCAD-specific library part format with limited editability outside of ArchiCAD.
  • Requires knowledge of GDL scripting for advanced customization.

Common Software Support

Graphisoft ArchiCAD is the primary host. Limited import/conversion via other BIM tools or specialized converters (e.g., IFC workflows).

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