That doesn't make any sense though!

That link says:

The pronunciation of "GIF" is specified in the GIF specification to be "jif", as in "jiffy", rather then "gif", which most people seem to prefer. This does seem strange because the "G" is from the word "Graphics" and not "Jraphics".

But then says:

That last statement doesn't mean anything. It's an acronym. There's no defined way to pronounce acronyms--it's up to the creators.

IDGAF how they want to pronounce it, it makes no sense