GSK may refer to:
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Galatasaray S.K.
Galatasaray Spor Kulübü (, ''Galatasaray Sports Club'') is a Turkish sports club based on the European side of the city of Istanbul in Turkey. Most notable for its association football department, the club also consists of various other de ...
, a Turkish sports club based in Istanbul
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Glycogen synthase kinase
Glycogen synthase kinase 3 (GSK-3) is a serine/threonine protein kinase that mediates the addition of phosphate molecules onto serine and threonine amino acid residues. First discovered in 1980 as a regulatory kinase for its namesake, glycoge ...
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Golden State Killer, a California serial rapist and murderer
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GSK plc, formerly GlaxoSmithKline, a multinational pharmaceutical corporation
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GTK Scene Graph Kit, a rendering pipeline
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