Stack Exchange Export as Google Document. Adapted from https://github.com/Glorfindel83/SE-Userscripts/blob/master/archivist/archivist.user.js

export-to-drive.user.js

// ==UserScript==
// @name        Export Stack Exchange post as Google Document
// @namespace   https://github.com/Glorfindel83/
// @description Adds a button to archive all external links and images in a post
// @author      Wicket
// @updateURL   https://gist.github.com/wicket-quest/f0b9edd43f9a804d1c5137c53be137ae/raw/c8fa557407aa1df8c90e15527e3e098aae77b7b1/exportAsGDoc.user.js
// @downloadURL https://gist.github.com/wicket-quest/f0b9edd43f9a804d1c5137c53be137ae/raw/c8fa557407aa1df8c90e15527e3e098aae77b7b1/exportAsGDoc.user.js
// @version     0.2.3
// @match       *://*.stackexchange.com/questions/*
// @match       *://*.stackoverflow.com/questions/*
// @match       *://*.superuser.com/questions/*
// @match       *://*.serverfault.com/questions/*
// @match       *://*.askubuntu.com/questions/*
// @match       *://*.stackapps.com/questions/*
// @match       *://*.mathoverflow.net/questions/*
// @exclude     *://*.stackexchange.com/questions/ask
// @exclude     *://*.stackoverflow.com/questions/ask
// @exclude     *://*.superuser.com/questions/ask
// @exclude     *://*.serverfault.com/questions/ask
// @exclude     *://*.askubuntu.com/questions/ask
// @exclude     *://*.stackapps.com/questions/ask
// @exclude     *://*.mathoverflow.net/questions/ask
// @connect     script.google.com
// @connect     script.googleusercontent.com
// @require     https://greasemonkey.github.io/gm4-polyfill/gm4-polyfill.js
// @grant       GM_xmlhttpRequest
// @grant       GM.xmlHttpRequest
// ==/UserScript==

/**
 * Export to Google Docs companion (https://stackapps.com/q/9730/105187)
 *
 * This userscript add the "Export" button next to post buttons at the bottom of the post. 
 * Clicking on this button will open a web application created using Google Apps Script 
 * in a new window. If the user have not signed-in in a Google account and authorized 
 * the app, it will show a button to sign-in and authorize. If the user is already signed or 
 * after the user signs-in by clicking but and have already authorized the app, it will
 * export the post to the user's My Drive (Google Drive root folder for the user).
 * 
 * At this time the authorization is handled using Google Cloud standard project set for 
 * testing purposes. This means that the testers should be registered and the number of 
 * testers is limited to 100.
 *
 * This is offered as is. Use under your own risk.
 */


/**
 * Default values for commom parameters
 */
var SETTINGS = {};

/**
 * 0 -> Plain text
 * 1 -> HTML file format. Markdown is converted into HTML using Showdown JavaScript library.
 * 2 -> Google Document file format. Markdown is first converted into HTML using Showdown 
        JavaScript library, then the file is converted into Google Document file format using Google Drive API.
 */
SETTINGS.option = 2;
/**
 * true -> Puts the content of all the posts into a single file, in other words, creates only on file.
 * false -> Puts the content of each post into a single file, in other words, creates multiple files, one for each post.
 */
SETTINGS.singlepage = true;

(function () {
  "use strict";
  
  $("a.js-share-link").each(function() {
    let shareButton = $(this);
    
    // Find links & images
    let post = shareButton.parents("div.question")[0];
    if (post == null) {
      post = shareButton.parents("div.answer")[0];
    }
    let menu = shareButton.parent().parent();
    
    let body = $(post).find("div.js-post-body")[0];
    
    let disabled = false;
    let hoverMessage = 'Export to Google Drive as ' + SETTINGS.option === 0 ? 'Plain Text file' : SETTINGS.option === 1 ? 'HTML file' : SETTINGS.option === 3 ? 'Google Document file' : 'Plain Text file';
    let button = $('<button class="s-btn s-btn__link" type="button" href="#" style="' + (disabled ? "color: #BBB" : "") + '" title="' + hoverMessage + '">Export</button>');      
    let cell = $('<div class="flex--item"></div>');
    cell.append(button);

    menu.append(cell);   
    
    /**
     *
     */
    function startExporting(event) {
      event.preventDefault();
      
      // TODO: overview of age of last snapshots, with checkmarks      
      if (!confirm('Are you sure you want to export this post?'))
        return;

      // Disable further clicks - the button becomes a progress indicator
      button.off('click', startExporting);
      button.on('click', function(e) { e.preventDefault(); });
      button.css("color", "#BBB");
      button.removeAttr("title");
      button.text("exporting ..."); 
      let shareButton = button.closest('.js-post-menu');
      let postId = shareButton.data('postId');
      console.log(postId);
      
      /**
       * Modified
       */
      function exportToDrive() {        
        let parts = location.host.split('.');
        let site = parts <= 3 
        ? parts[0]
        : location.host.slice(0,location.host.indexOf('.',5));        
        // Call Export to Google Docs app        
        let archiveLink = "https://script.google.com/macros/s/"
        /** Google Apps Script ID */ + "AKfycbx6FVgi56a9loC1cWNlqgbFkCM86xtk6BtpOy3wioWGm6aS4p1pREg9LnKJY5pma5vVIQ" 
        /** Path sufix */ + "/exec"
        /** Query string */ + "?" 
        /** Site parameter */ + "site=" + site
        /** Post id paramenter */ + "&postId=" + postId
        /** Output format parameter */ + "&option=" + SETTINGS.option
        /** Simple page parameter */ + "&singlepage=" + SETTINGS.singlepage
        // console.log(archiveLink);
        window.open(archiveLink);        
        }
        exportToDrive(); 
        // Update archive button      
        button.text("exporting tab opened")
    }
    button.on('click', startExporting);
  });  
})();