Searching "GENDER" finds nothing useful because it returns only exact matches, not only by case but also from space to space, so to find a string like "{{GENDER:$1|sò|sò|sò}}" you have to use it all as keyword, or to use the wildcard: *GENDER*
Precision is nice but at the very least things like brackets, pipes etc. should be considered word boundaries. When a decision is made, add info on how to use wildcards etc.

Version: master
Severity: enhancement
URL: https://translatewiki.net/w/i.php?title=Special%3ASearchTranslations&query=GENDER
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=46117