GCO Viewer

Software supporting GCO files

If our GCO Viewer Online did not help you, you have a few more options. The first is to download the software that supports GCO files Below are some examples of verified applications. By choosing the option to install dedicated software, you will also be able to e.g. edit the GCO file and sometimes even convert the GCO file.

Advantages and disadvantages of this solution

The first important thing is that you will need to download and install a dedicated application that supports the GCO format on your device. In this case, it is not possible to view the GCO file online. This method is more complicated, but it offers more possibilities for working with the GCO file. You can find some examples of dedicated software below, and the full list is here GCO File Opener

Programs supporting GCO

Genbox Family History

Other ways to view the GCO file

If you still cannot see the contents of the GCO file, but also don't see the need to install dedicated software, then there are other solutions. A large proportion of the data formats are simply archives or plain text files. In this case, it is likely that you will be able to view the contents of GCO with a normal "Notepad". I can at least to some extent let you see the contents of the file with the extension GCO.

As in the case of Notepad, you can also use the data archiving program. Try to open your file with e.g. Winrar or Winzip. If your GCO file belongs to the archived files category, you will see a list of files inside the archive. Go to the information page about the GCO file extension. to see what kind of data it contains.

Other solutions

You can also try to use solutions offered by external suppliers, such as:

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