Gamliel competed for Israel at the 1984 Summer Olympics in Los Angeles, California, at the age of 26. In the Men's 5,000 metres he came in 10th in Heat 3 with a time of 14:02.98 (missing qualifying for the final by 12 seconds), and in the Men's 10,000 metres he came in 10th in Heat 2 with a time of 29:31.32. When he competed in the Olympics, he was 5-4.5 (165 cm) tall and weighed 106 lbs (48 kg).