Your Query returns 7 Accession Numbers:
Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
GAT3NM_14451210090Gabt3    Slc6a13   
Gat3NM_02437210116Gabt4    Slc6a11   
GAT3NM_0142299606GAT-3    SLC6A11   
GAT3BC02963710090Slc6a13   
GAT3BC02311710090Slc6a13   
GAT3BC02160610090Slc6a13   
GAT30N/A

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* OMIM link based on symbol match for human and mouse.

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Text2Knowledge ... Yong Huang 2002