Well, this is an old thread, but I am facing the same problem now... I need to get GIF files down to hex codes. I didn't want to install GD.pm for this, and even if I could/wanted, GD doesn't support GIFs anymore...
Is there any documentation out there on the GIF format?
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Since GIF is somehow patented, I'm guessing GD removed GIF support so as to not have license worries.
If you are on Unix or Linux, you might want to use an application like gif2png to convert the image to a more open format supported by GD.
Barring that, a search on "gif specification" at google.com might be the place to start.
There is also Image::Magick (aka PerlMagick).
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