Your Query returns 5 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
GPRC2ANM_0003889606FHH    HHC    HHC1    NSHPT    PCAR1    CASR   
Gprc2aNT_08236210090
Gprc2aNM_01380310090CaR    Casr   
Gprc2aXM_14722310090CaR   
Gprc2aNT_03962410090

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

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Text2Knowledge ... Yong Huang 2002