God's Gift To Women Meaning

(idiomatic) Someone irresistible to women, someone whom all women find attractive.

Example: 1964, Hesba Brinsmead, Pastures of the Blue Crane
  After one encounter she confided to Rose, "You know, Glen's grown to simply love himself so much, he just thinks he's God's gift to women. All the girls at that stupid uni seem to fall over each other to ride in his precious car...."