Gail India has posted a net profit of Rs 572.54 crore for the quarter ended September 30, 2007 when compared with Rs 448.40 crore for the quarter ended September 30, 2006.According to an official release issued by the company to the BSE today, total income has increased to Rs 4,709.50 crore for the quarter ended September 30, 2007, from Rs 3,874.36 crore for the quarter ended September 30, 2006.