In most cases, this particular gnc to jef conversion seems to be related to a transformation of embroidery designs from Great Notions machines to Janome machines. You can usually convert various embroidery formats between each another with dedicated embroidery editor. Some good choices are listed below.
Convert Great Notions embroidery file to Janome embroidery layout.
We have found 5 software records in our database eligible for .gnc to .jef file format conversion.
Microsoft Windows software - convert gnc to jef on Windows
A free embroidery editor and converter
Convert from gnc file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned gnc to jef. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
An embroidery designs manager
Apple macOS / Mac OS X software - convert gnc to jef on OS X
Converter for embroidery designes
Multiplatform software - convert gnc to jef on any platform
Advanced version of the popular Embroidermodder
An embroidery editor and converter