What is a GPL file?
The .GPL file extension most often identifies a GIMP color palette. These files store collections of colors for image editing. However, the .GPL extension has multiple possible meanings. It can also be a Gnuplot plotting script, a Geologix GeoSuite well log data file, a GeoPrinter geocache list, or a game script used by Cyberlore Studios.
How to open GPL files?
Because a .GPL file has multiple possible meanings, it is hard to know the correct software to use. For a GIMP Palette, you use GIMP or Inkscape. For a plotting script, you use Gnuplot. If you are unsure, we recommend viewer.online/gpl to identify the actual format of your file. viewer.online/gpl can analyze .GPL files to identify the exact format and creator software, inspect the file structure, extract readable text, and check whether an online preview is available.
Software and tools
To edit palette files, use GIMP. GIMP palettes are plain text, so you can also open them in simple text editors like Notepad++ or Visual Studio Code. Gnuplot scripts are also plain text and easy to read. If you want to use the palette in different software, you must convert it. You can convert files to sensible target formats on convert.guru. For example, you can convert a .GPL palette to a .ACO (Adobe Color) or .ASE (Adobe Swatch Exchange) file.
Summary
viewer.online/gpl is useful for identifying, inspecting, and understanding .GPL files without installing software or dealing with compatibility problems.