Can't upload GIF files I have the same error in here.

Craft info says i have installed the ImageMagick extension successfully  and even use ‘imageDriver’ =&gt; ‘imagick’ in config file. But still cant upload GIF files.
Issue is resolved, as @bradbell said the version for ImageMagick module and library was old and need to be update. You can check the latest relase from here: https://www.imagemagick.org/script/changelog.php 

From some servers apt-get update won't really update the package. So you need yo install manually. There is a great how to article regarding this