HGSS may refer to:
Croatian Mountain Rescue Service (HGSS - Hrvatska gorska služba spašavanja) Holmer Green Senior School, a secondary school in Buckinghamshire, England Hougang Secondary School, a secondary school in Hougang, Singapore Pokémon HeartGold and SoulSilver, remakes of Pokémon Gold and Silver originally released in 2009 for Nintendo DS , a secondary school in Hong Kong