Is there a way to change the name of a gist (github) ?, apparently it is ordering the files of the gist in alphabetical order, an naming the gist according to the file that appears first.
Considering the order of files within a gist is asciibetical, you can try and add one file in uppercase.
That file will come before any other and will define the name of your gist.
Note that it won't change the url of said gist, as explained in "Namespaced Gists".