It is very difficult to create embroidery designs from raster pictures, for example Janome JEF files from GIFs, simply due the fact that embroidery designs are vector based and it's hard to create complex vectors from bitmap pictures.
Nonetheless an experienced graphics designer should be able to create embroidery design from some image, usually with some expensive digitizer software. Some embroidery software can also possess basic digitizing function that can convert raster image to embroidery, but that's usually far from perfect, but something like gif to jef conversion is doable.Open GIF file Open JEF file
An embroidery designs manager
An embroidery digitizer