Opening GMX Files

The GMX file type is primarily associated with BaseCamp.

GMXFile Extension GMX
File extension: GMX
File type:  waypoint

What is a GMX file?

GMX files mostly belong to BaseCamp by Garmin. A GMX file is a game project created with GameMaker Studio game development environment. The contents of a GMX file are written in Extensible Markup Language (XML). They include project settings and references to scripts, fonts, objects, and media sources (videos, images, sprites, and audio clips) used to develop a game. Another type of GMX file contains a message created by Groupmail email marketing automation software. GMX is also the filename extension of a waypoint created by Garmin GPS devices. BaseCamp can import, edit, and export GMX waypoint files to and from GPS devices.

How to open a GMX file

You need a suitable software like BaseCamp to open a GMX file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your GMX file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a GMX file directly in the browser:. Just drag the file onto this browser window and drop it.

Online GMX Text Viewer

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Programs that open and convert GMX files:

  1. BaseCamp by Garmin
    See the previous paragraphs to learn more about the main application. GMX files are often referred to as BaseCamp gis because this type of file is primarily created or used by this software.
  2. GameMaker Studio (game project) by YoYo
    GameMaker Studio is a visual game development environment. A game project created with GameMaker Studio is saved in an XML-encoded GMX file. This file format is classified as Developer.
  3. Groupmail (message) by Groupmail
    Groupmail is an email marketing automation program for creating and deploying email newsletters, campaigns etc. It uses a GMX file to store a message. This file format is classified as Data.

GMX file format details:

The file format, which is the arrangement and type of data in a file, determines which program can open the file. The initial characters of a file are called signature, sometimes also referred to as "magic bytes". The signature can be used to infer the file format. Nonetheless, different programs can utilize the same file extension to represent distinct file formats. Double-clicking on the file often results in an error when opening. Exact knowledge of the format is therefore important in order to solve problems occurring in files. Below is our analysis of the GMX files:

The GMX file extension is rarely used and covers different formats for different programs. The two most popular formats are as follows:

The remaining 28% of all GMX files are files with no common format. These files are often connected to gene, player, edition, geneset, masters, enemy or loot. Drag & drop your file here to see the file format and a preview of your GMX file!

Technical Data for GMX File Extension

File classification:
GIS
Related files:
gmz, gpx, wdproj, zip, gml, gmt, gmax, unl, wpt, mps

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.

ProgramID: GroupMailMessage.Document, FileType: Group Mail Message, AppName: Group Mail 3.4
EXEFile: agmail.exe

ProgramID: agmail.Document
EXEFile: %ProgramFiles%\GROUPM~1\agmail.exe %1


a gmx waypoint is a special file format by Garmin and should only be edited and saved with the appropriate software.

How to solve problems with GMX files

  • Associate the GMX file extension with the correct application.
  • Update your software that should actually open waypoints. Because only the current version supports the latest GMX file format. Search, therefore, e.g. on the Garmin manufacturer website after an available BaseCamp update.
  • To make sure that your GMX file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
  • Click here to open your .GMX file online - secure, fast, and no downloads needed.
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