A M$ .doc is just code - ascii text plus formatting code for colours, shapes, arrangement; a .gif is a coded image map of pixels, the code may contain instructions for presenting multiple images [if they exist] embedded in the .gif file, and the two are way different. You will need some software. Take a screenshot of your doc with printscreen or a specialised screenshot reader such as ABBYY's, save the image as a .jpg, then use a software such as Adobe ImageReady or Ulead GIF Animator to convert and save as .gif.
Then rename without the extension.
It works.... I just tested it.