HGS
HGS is an abbreviation for:
- Hervormd - Gereformeerde Staatspartij, a former Dutch political party
- Humboldt High School Solingen, an urban high school of the district-free city of Solingen
HgS is an abbreviation for:
- Main command post, implementing agency of the People's Navy of the GDR in the event of war
- Mercury sulfide, a chemical compound comprising mercury and sulfur
- Disambiguation
- Abbreviation