The Shalit family and their supporters have embarked on an 11 day protest march across Israel to draw attention to Gilad’s plight.
More than 10,000 people have joined the march from the north of Israel to Jerusalem.
Mr Shalit and his wife Aviva are also planning to camp outside Prime Minister Benjamin Netanyahu’s home to pressure the Israeli government to bring the soldier home.
British supporters of have also organised a vigil outside Downing Street.
Hamas have released brief video footage proving the soldier is still alive, but negotiations for prisoner exchanges have so far failed.