Your Query returns 17 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
GATA3AF4598009685
Gata3NM_00809110090Gata-3    131320
gata3NM_1312117955gta3    cb550   
Gata3NW_04749210116
GATA3BC0068399606HDR    MGC5445    131320
GATA3BC0030709606HDR    MGC5445    131320
GATA3BC0067939606HDR    MGC5445    131320
GATA3AY4970069606131320
GATA3AY4115649606131320
GATA3AY4115659598
GATA3AY41156610090131320
GATA3NM_0020519606HDR    MGC5445    131320
Gata3NT_03920210090131320
Gata3AY32511310042
Gata3BC06291510090131320
GATA3NT_0775699606131320
Gata3NM_13329310116

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

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Text2Knowledge ... Yong Huang 2002