Mr Christie sustained serious injuries and was taken to the Victoria Hospital, Kirkcaldy, then later to the Edinburgh Western General Hospital where he died at 16:15 on Monday.
Mr Christie’s family said: “He always put others first.”
They added: “Gary was a loving and devoted father to his two sons, Lewis and Ryan.
“He will be sadly missed by all who knew him.
“The family would like to thank staff at the Victoria Hospital, Kirkcaldy, and the Western General, Edinburgh.”
Sgt James Henry, of Police Scotland, said: “This is a tragic incident and our thoughts are with Gary’s family.
“We are still investigating this collision and would ask that anyone with information contact us as soon as possible.”