Assalam o alaykum,
Imam al-Mutakallimin Allamah Asfahani (may Allah have mercy on him) says:
من ضروريات الدين ان علم الغيب مختص باللّه تعالى
It is from the fundamentals of Din that ilm-e-ghayb is specific to the Zat of Allah.
Imam Shafi (may Allah have mercy on him) said:
ان اللّه تعالى استاثر بعلمه الغيب
Verily Allah has specified the knowledge of unseen to Himself only.
[Kitab al-Umm, II:202]
When Mujaddid Alf-i-Sani (may Allah have mercy on him) read that a certain ghali Sufi named Abdul Karim Yamani said that Allah is not Alim al-Ghayb, so Imam said, when I hear stuff like this, my Faruqi veins/blood boils, and I have no strength to hear nonsense like this. Then he went on to said that to say Allah is not Alim al-Ghayb is like doing takzib of Allah.
No one beside Allah has the complete knowledge of unseen but different individuals are given different amount of news of ghayb or "anba ul-ghayb/akhbar ul-ghayb."