Hi,
for MoiImport, PDF-File and AI-File needs vektordata info in the file.
Moi is not raster to vector converter.
Gimp produced rasterformat.

For vektor see:
www.mayura.com (Mayura Draw Vector Drawing Program)
www.deneba.com (Deneba Canvas)
www.inkscape.org (Inkscape, only svg)
www.adobe.com/de/products/illustrator (AI)

MS-Office, Open-Office ect....