GIF is a pictures format just like JPG or BMP. I haven't tried yet but I'm pretty sure that the EFB will support JPG as well. Anyway, like Luke said, Photoshop is one way to do it but there are easier ones, especially if you're not familiar with Photoshop. Just Google "PDF to GIF" and a bunch of free website that offer conversion will pop up. When you find the one you like the most just go through their process and save the converted images within the appropriate path in FSX.