Converting .gdoc files to .html format.
It is not possible to directly to convert Google Docs Shortcuts to Hypertext Markup Language Files (.gdoc to .html conversion), since .gdoc files only contain references to documents it is meant to open, as well as the appropriate Gmail account link to the document.
You can, however, use the .gdoc link to open the actual Google Document, and then download it as an HTML file.
There are no online converters capable of directly converting .gdoc to .html.