The age distribution, , in Gaiserwald is; 881 children or 11.8% of the population are between 0 and 9 years old and 1,167 teenagers or 15.6% are between 10 and 19. Of the adult population, 823 people or 11.0% of the population are between 20 and 29 years old. 1,165 people or 15.5% are between 30 and 39, 1,236 people or 16.5% are between 40 and 49, and 1,060 people or 14.1% are between 50 and 59. The senior population distribution is 643 people or 8.6% of the population are between 60 and 69 years old, 362 people or 4.8% are between 70 and 79, there are 144 people or 1.9% who are between 80 and 89, and there are 14 people or 0.2% who are between 90 and 99.