https://gist.github.com/search?q=user%3A%40me&ref=searchresults
Uses @me to refer to itself in the gist search query.
Type this into Github Gist Search (https://gist.github.com/)
user:BoQsc your search query
or
@BoQsc your search query
https://gist.github.com/search?q=user:boqsc&ref=searchresults
Replace ?q=user:boqsc with your own username.

Which there was a better search form for gists.