The size of Gemalla is approximately 24.3 square kilometres. It has 1 park covering nearly 74.3% of total area. The population of Gemalla in 2011 was 648 people. By 2016 the population was 9 showing a population decline of 98.6% in the area during that time. The predominant age group in Gemalla is 30-39 years. Households in Gemalla are primarily childless couples and are likely to be repaying $1000 - $1399 per month on mortgage repayments. In general, people in Gemalla work in a managers occupation. In 2011, 85.1% of the homes in Gemalla were owner-occupied compared with 140% in 2016.