.GEF File

The gef file extension is related to Geotechnical Exchange Format, a general language structure for storing and transferring geotechnical information.

GEF states in a procedural way how a new structure (a set of rules for the storage of measurements) should be composed. This report provides a basis for a general exchange of digital cone penetration test data.

How to open:

You can probably work with this file type only in special geotechnical programs.

How to convert:

Considering it is an exchange format, it is very likely you can convert .gef files to other similar format.