GPS TrackMaker data
File type: GIS, GPS navigation and map file
The gtz file extension identifies a compressed GPS TrackMaker data file. A gtz file can contain GPS tracks, routes, waypoints and related project data.
It is a native file format used by GPS TrackMaker on Microsoft Windows.
File type category:
GIS, GPS navigation and map file
Date updated: November 9, 2026
The gtz file extension is associated with GPS TrackMaker, mapping and GPS navigation software for Microsoft Windows developed by Geo Studio Technology.
A gtz file stores compressed GPS TrackMaker project data, including items such as tracks, routes and waypoints. It is the compressed counterpart to the software's native project data format and is intended to be opened and managed in GPS TrackMaker.
The format is specific to GPS TrackMaker rather than a general-purpose GPS exchange format. Its use is therefore tied to the Windows software that created it.
Open a gtz file with GPS TrackMaker on Microsoft Windows. Use the program's Open command and select the file; the software can read the compressed data and display its GPS content.
If the file does not open, it may have been created by a different GPS TrackMaker version or may be damaged.
Open the gtz file in GPS TrackMaker and use Save As to create the software's uncompressed native GTM file, or use the program's export commands to save the GPS data in a supported exchange format such as GPX.
Conversion should be performed in GPS TrackMaker because the file's tracks, routes, waypoints and other project data may not be preserved equally by every export format.
Software apps that create gtz files:
Microsoft Windows
Software applications that handle other tasks involving gtz files:
Microsoft Windows
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