Dr Gan obtained his MBBS from National University of Singapore in 1987, Masters in Medicine (Surgery) in 1992 and is a Fellow of the Royal College of Surgeons, Edinburgh since 1991 and a Fellow of the Academy of Medicine Singapore since 1998. His main interest is in Prostate diseases including benign prostate enlargement, Prostate cancer and other genitourinary Cancers such as Bladder Cancer, Kidney Cancer, Testis Cancer as well as Kidney Stone and Men's Health and Fertility. He was an honorary Fellow at St. Vincent's and Western Hospital, Melbourne, Victoria, Australia where he studied the use of lasers in the treatment of prostate and urinary stones. He also completed his mini-residency in Robotic Radical Prostatectomy at the Royal Melbourne Hospital, Victoria, Australia and University of California, Irvine, USA.
He was instructed on Male Fertility at the New York Hospital, USA. Upon returning to Singapore, he was with the public health service including serving in the National Kidney Transplant Program before entering private practice in 2001. Dr Gan is accredited with the Specialist Board, Ministry of Health, Singapore and the Singapore Medical Council since 1998. He is conversant in English, Chinese, Malay, Bahasa Indonesia, Hokkien.