Your Query returns 48 Accession Numbers:

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

Gene/Allele	Accession	NCBI Taxonid	Synonyms
GCL	BC005214	9606	GCA **
GCL	BC024184	9606	GMCL
GCL	BC024185	9606	GMCL
GCL	BC033886	9606	GMCL
GCL	NM_012198	9606	GCA **
GCL	NM_022471	9606	GMCL
gcl	L03845	562
gcl	U82664	562
gcl	AP005946	224911
gcl	AL627267	90370	STY0565
gcl	AY061319	7227
gcl	AL646074	305	RS02510 RSc3281
gcl	AE000157	83333	b0507
gcl	AE005231	155864	Z0661
gcl	AE015077	198214
gcl	AE016790	160488
gcl	AE016757	199310
gcl	AE004579	208964
gcl	AE016842	209261
gcl	AE016979	198215
gcl	AE008720	99287	STM0517
gcl	AE005174	83334	Z0661
GCL	AF198534	9606
Gcl	AF163665	10090
Gcl	AF163666	10090
Gcl	NT_039353	10090
Gcl	AF282322	10090
Gcl	BC054767	10090	mglc-1
gcl	NC_004463	224911
gcl	NC_000913	83333
gcl	NC_002516	208964
gcl	NC_002655	155864
gcl	AF355473	8090
gcl	NC_002947	160488
gcl	NC_004337	198214
gcl	NC_004431	199310
gcl	NC_004631	209261
gcl	NC_004741	198215
gcl	NC_003198	90370
gcl	AE003836	7227
gcl	NC_003197	99287
gcl	NC_003078	266834
gcl	AB115590	573
gcl	NC_003295	267608	RS02510
GCL	NM_178439	9606	GMCL2 FLJ13057
Gcl	NM_011818	10090	mglc-1
gcl	NM_165622	7227	gcl-1 CG8411
gcl	NT_033778	7227	gcl-1 CG8411

Text2Knowledge ... Yong Huang 2002