Egypt's Mahmoud Shikabala opened the scoring with a left-footed strike in the 62nd minute but Netherlands-born striker Gyasi equalised just two minutes later with a deflected effort from outside the area.
It was only the second cap for the 26-year-old Gyasi, who plays his club football in Norway.
Egypt secured qualification for next year's tournament in Russia when they beat Congo in Alexandria last month. It will be their first World Cup since the 1990 finals in Italy.
(Reporting by Mark Gleeson; Editing by Toby Davis)