| Qualifier | gene_synonym |
| Definition | synonymous, replaced, obsolete or former gene symbol |
| Value Format | "text" |
| Example | /gene_synonym="Hox-3.3" in a feature where /gene="Hoxc6" |
| Comment | used where it is helpful to indicate a gene symbol synonym; when used, a primary gene symbol must always be indicated in /gene or a /locus_tag must be used. |