GNU Social includes a basic search engine that allows for one to search notices, groups, and people.
This can be done through the UI, or by appending the search term to one of the URLs below (where %s is the seach term):
- Notices:
https://example.com/search/notice?q=%s - People:
https://example.com/search/people?q=%s - Groups:
https://example.com/search/group?q=%s