Gladys had a previous relationship with another GRGICH, possibly a relative of George's.He died just before her marriage to George. Her children's names are listed here in his death notice. It seems he was also known as "Mick".
GRGICH - On March 18 at his late residence Durham-street, Bayswater, Nikola Grgich, dearly loved husband of Gladys, loved friend of Bernard, Patricia, Robinetta and Barbara, aged 50 years. Peacefully Sleeping.