It’s official. According to Alex Trebek, GIF has a soft ‘g’ which sounds like a ‘j’, as in Jiffy peanut butter. Alexis Kleinman:
No, I don’t care that it sounds like the peanut butter. It’s the way the photo format’s inventor says it’s supposed to be pronounced. Plus, now that Trebek has uttered the word with the soft “G,” it has to be correct.
Who is more authoritative than Alex Trebek?