The size of Gilston is approximately 9.5 square kilometres. It has 13 parks covering nearly 0.6% of total area. The population of Gilston in 2011 was 1,449 people. By 2016 the population was 2,468 showing a population growth of 70.3% in the area during that time. The predominant age group in Gilston is 0-9 years. Households in Gilston are primarily couples with children and are likely to be repaying $1800 - $2399 per month on mortgage repayments. In general, people in Gilston work in a trades occupation. In 2011, 82% of the homes in Gilston were owner-occupied compared with 77.4% in 2016. Currently the median sales price of houses in the area is $855,000.