| 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) |