Gabriel...who over a period of 27 years revealed the totality of the Holy Qur'an to the Prophet. It is generally assumed that the angel Gabriel was some spooky being with wings or something that is other than a man. The Prophet and the Holy Qur'an says differently: the angel Gabriel was a Man.
Qur'an 19:17 "Then We sent to her (Mary) Our spirit and it appeared to her as a Well-Made MAN."
It's also noted in a Hadith, "the Angel comes to me in the likeness of a MAN and speaks to me and I retain in memory what HE says."
Gabriel, according to the Encyclopedia of Islam means "Man of God." It goes on to say "as a rule he appeared as an ordinary strong man...wearing two green garments and a silk turban on a horse."