GMW File Extension

GMW file icon

Global Mapper Workspace

What is a GMW file?

Files with the GMW extension are specifically tied to Global Mapper Workspace, a Settings Files type, and there are 1190 files in this category.

With the creation of the Global Mapper Workspace (GMW), Global Mapper introduced file format along with programs built for their use.

GMW files are supported by Windows. You can open a GMW file using one of 2 programs, for example Global Mapper and OziMapConverter.

Programs that support GMW files

How to open a GMW file?

The most common reason why a GMW file cannot be opened is the absence of required software. To fix this, select a compatible program from the list. Then visit the official developer website via the provided link, download the program, and install it on your system.

Global Mapper and OziMapConverter stand out as the preferred programs to manage GMW files effectively. To install the latest version of Global Mapper on your computer, visit the Global Mapper website where you can download the version available for all operating systems.

Once installed, Global Mapper will be set as the default program, and GMW files will open automatically.

Set Global Mapper as the default GMW application

Change the default app that opens a file on Mac

  1. Right-click or use Control + Left-click on the desired GMW file to open a menu where you can choose from multiple actions;
  2. Choose "Open in Application" and click "Other";
  3. At the bottom of the window, find the "Enable" menu, where "Recommended Programs" is already selected by default;
  4. Within this menu, select "All Programs" and then locate Global Mapper. Check the box next to "Always open in app" to set it as the default program.

Set default programs for Windows

  1. Start the process by right-clicking on your GMW file and selecting "Open With". From there, click "Choose another app" to continue;
  2. From the options listed in the pop-up window, specifically choose Global Mapper as the application to handle your GMW file;
  3. Be sure to check the "Always use this app" checkbox and click "OK" to save your preference.

Troubleshooting guide for GMW file complications

Certain problems with GMW files can be conveniently fixed with small software tweaks. Here are some helpful tips to address them.

How can I confirm if my GMW file has been damaged?

GMW settings files that have become corrupted may display one or more of the following symptoms:

  • The file exhibits poor performance during editing operations in Global Mapper;
  • The file causes Global Mapper or other software to hang or crash during various operations;
  • The file encounters problems during the opening process or shows error indications;
  • An unexplained increase in the size of the GMW file;
  • The file operation is accompanied by the display of error messages;

Why does Global Mapper crash?

Lack of regular software updates can cause Global Mapper to crash. Make sure you have installed the latest updates for Global Mapper products.

Restarting your computer is a crucial troubleshooting measure that can alleviate numerous common problems. Therefore, it is advisable to restart your computer before modifying any settings related to the software.

How to repair a corrupted GMW file?

Start a recovery program, open the damaged GMW file and then select the "Repair" menu item to start the repair procedure. Wait for the recovery process to finish as it will automatically restore the damaged settings files.

How to edit a GMW file?

To make changes to GMW files, you need specialized software that allows both opening and editing the settings files. Online GMW editors offer fewer capabilities than applications optimized for Global Mapper Workspace.

Best GMW editors 2026

Considering the mentioned criteria, we have compiled a list of GMW editors that may suit your needs.

GMW Editor SoftwareDeveloperPlatformsOverall Rating
Global MapperGlobal MapperWindows4.4 out of 5 (40 reviews)