chemical synaptic transmission synaptic transmission, GABAergic synaptic transmission, gamma-aminobutyric acid mediated synaptic transmission, gamma-aminobutyric acid-ergic synaptic transmission, GABA mediated biological_process The vesicular release of gamma-aminobutyric acid (GABA). from a presynapse, across a chemical synapse, the subsequent activation of GABA receptors at the postsynapse of a target cell (neuron, muscle, or secretory cell) and the effects of this activation on the postsynaptic membrane potential and ionic composition of the postsynaptic cytosol. This process encompasses both spontaneous and evoked release of neurotransmitter and all parts of synaptic vesicle exocytosis. Evoked transmission starts with the arrival of an action potential at the presynapse. GABAergic synaptic transmission GO:0051932