This command works in the "Find in Files" results window. It lets you open any of the search results.
If your cursor is on a line that shows a line number, using the command will open the file in which the line was found, and scroll to the line.
If your cursor is on the line that lists the file name (not the line number), the command will open the file at the first line.
I designed it for use with Vintage, and it has a "g, o" Vintage keymapping by default, but it should work otherwise.
It should work on Linux and OS X, but probably not Windows.