GCO File - opening and understanding

Did your computer fail to open a GCO file? We explain what they are used for and recommend software that we know can open or otherwise handle your .GCO files.

What is a GCO file?

A .GCO file is a Genbox Family History chart options file. Through our analysis of GCO files, we know that one use of the format is Genbox Family History chart options. We have not yet described in detail what these files contain and what they are used for, but our team is working tiredlessly through thousands of file formats. We'd love hearing from you if you have information about the format.

How to open GCO files

You will need a program compatible with the specific file you are trying to open, as different programs may use files with file extension GCO for different purposes.

While we have not verified the apps ourselves yet, our users have suggested 2 different GCO openers which you will find listed below.

Suggest another file format using extension GCO

While we know of one file format using the .GCO file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .GCO file.

Various viewers for this file format

These apps are known to open certain types of GCO files. Remember, different programs may use GCO files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Genbox Family HistoryGenbox Family HistoryUser submitted
Repetier-HostRepetier-HostUser submitted
We have not verified any software that we know for certain will work with GCO-files on Mac. If you know one, please use the 'Suggest a program' link below and tell us about it!
We have not verified any web services that we know for certain will work with GCO-files. If you know one, please use the 'Suggest a program' link below and tell us about it!