GSSM
| Acronym | Definition |
|---|---|
| GSSM | Governor's School for Science and Mathematics (South Carolina) |
| GSSM | Graduate School of Systems Management (Tsukuba University; Japan) |
| GSSM | Gene Site Saturation Mutagenesis |
| GSSM | Global Site Selector Manager (Cisco) |
| GSSM | Global Sourcing & Supplier Management |
| GSSM | Global Strategic Standardization Management (est. 1990; American National Standards Institute) |