The cluster of three GABAA receptor subunit genes (GABRB3, GABRA5, and GABRG3 which encode the receptor subunits β3, α5, and γ3, respectively) is of particular importance for neurodevelopmental disorders with epilepsy and autism because of GABA (Gamma amino-butiric acid) being the main inhibitory neurotransmitter in the brain [13]. Here, GABRA5 is linked to autism.