Unable to provide a gene function summary for GSC (goosecoid homeobox) based on the provided PubMed abstracts. All seven abstracts discuss GSC as an acronym for 'glioma stem cells' or 'glioblastoma stem cells' in the context of brain tumor biology, not the goosecoid homeobox gene. The abstracts examine various molecular pathways in glioblastoma stem cells, including CLOCK-mediated immunosuppression 1, IGFBP5-ROR1 signaling in invasion 2, TAM-derived TGFBI in stemness maintenance 3, hypoxia-responsive LUCAT1 function 4, SUV39H1-mediated chr14 regulation 5, POSTN in GSC-microglia crosstalk 6, GPNMB-mediated bidirectional interactions 7, and YAP/TAZ as stemness regulators 8. None of these sources address the developmental or homeotic functions of the GSC homeobox gene, its role in embryogenesis, middle ear development, neural crest specification, or its association with skeletal abnormalities and auditory canal atresia as described in the NCBI and UniProt summaries. To provide an accurate gene function summary grounded in the provided literature, PubMed abstracts specifically discussing the goosecoid homeobox gene would be required.