The forward arrives at the KC Stadium from Al Ahly until the end of the campaign, subject to international clearance.
The move marks a second spell at the Premier League club for a player who initially enjoyed a 12-game spell on loan during the second half of last season, during which he scored five goals.
A statement on the club's official website confirmed the deal late on deadline day.
It read: "Hull City have added to their striking options with the loan signing of Gedo from Al Ahly.
"Gedo has joined on a season-long loan, subject to international clearance."
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