GAT1 also known as SLC6A1 is a high-affinity Na+/Cl−-dependent plasma membrane transporter that clears γ-aminobutyric acid (GABA) from synaptic and extrasynaptic spaces to shape inhibitory neurotransmission. By regulating GABA reuptake, GABA T-1 influences neuronal excitability, synaptic timing, and network oscillations, linking transporter activity to neurotransmitter cycling and ion-coupled transport processes. GAT1 dysfunction is associated with neurodevelopmental and epilepsy-related phenotypes, and altered GABA homeostasis has been implicated in broader mechanisms of cortical circuit imbalance. Experimental perturbation of GAT1 supports pathway-level studies of inhibitory signaling, receptor activation dynamics, and compensation by related solute carrier transporters.