It depends on your culture and/country you live in. In some regions of world 🌎 spell it in different or pronounce ways but is the same thing: phone 📲 or fone, tomato 🍅 or tomahto etc... The person who created it said pronounce JIf but it spell Gif, GIF= standful: "Graphic Interchange Format" either way you can pronounce them both way Jif or Gif is both right, whatever you prefer. The main point is focus and observe on information how to do it. Be open mind about all things.
I know that the inventor said it was supposed to be pronounced “jif,” but I hate it so much. Every time you say it (and you say it sooooo many times!), it’s like nails raking down a chalkboard. 😖