Creator of the GIF says it is pronounced "Jif"
GIF開発者「GIFの発音は”JIF”」

The creator of the GIF file format has sparked a lively debate on Twitter
after announcing that it must be pronounced "Jif".

Steve Wilhite made the controversial declaration during an interview with
the New York Times in the run up to the Webby Awards where he will accept
a lifetime achievement award.
He said he was proud of his creation but remained annoyed that most people
failed to get its name right.

"The Oxford English Dictionary accepts both pronunciations," he said.
"They are wrong. It is a soft 'G,' pronounced 'jif.' End of story."

The announcement caused shock and outrage on Twitter, where users reacted
with horror. "I refuse to accept this," said one, while another tweeted
"My life has no meaning any more".
http://www.telegraph.co.uk/technology/10072420/Creator-of-the-GIF-says-it-is-pronounced-Jif.html

CompuServeのSteve Wilhiteさん