The GSA is an expensive and very proprietary search box created by Google.
It works great at search, and seems to be insanely powerful, except for one little problem:
Meta data limits
Maximum number of meta tags that can be returned with getfields: 64.
Maximum number of bytes per meta tag returned, including the name of the meta tag and its contents: 320 bytes.
Maximum number of bytes of meta data returned per search result: 4K bytes.
Oh man….this is going to be a long, loooooong day