Your Query returns 18 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Gucy1b2NM_17281010090B930025B03    603695
Gucy1b2NW_04745410116
GUCY1B2AF2183839606603695
GUCY1B2AF2183849544
GUCY1B2AF2183859593
GUCY1B2AF2183869598
GUCY1B2AF2183879580
GUCY1B2AF0384999606603695
GUCY1B2NM_0041299606GC-SB2    603695
Gucy1b2NT_03960610090603695
Gucy1b2AB11483510116
Gucy1b2AB11483510116
Gucy1b2AB11483510116
Gucy1b2AF35256610116
Gucy1b2AY00415310116
Gucy1b2AY23651310090603695
GUCY1B2NT_0245249606603695
Gucy1b2NM_01277010116SGC   

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

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Text2Knowledge ... Yong Huang 2002