GIMP graphics editor can create animated brushes (.gih) from any existing graphics images, including its native (.xjt) images. This does not appear to be standard conversion, more of a standard workflow done in GIMP.
Convert Compressed GIMP image file to GIMP animated brush.
We found 3 software records in the database related to .xjt to .gih file format conversion.
Microsoft Windows software - convert xjt to gih on Windows
A free graphics and photo editor and authoring tool
Convert from xjt 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 xjt to gih. 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.
Apple macOS / Mac OS X software - convert xjt to gih on OS X
Mac version of the popular graphics editor
Linux/Unix software - convert xjt to gih on Linux
GNU Image Manipulation Program