gistfile1.txt

function spreadsheetToPDF(key) {

  var oauthConfig = UrlFetchApp.addOAuthService("spreadsheets");
  var scope = "https://spreadsheets.google.com/feeds"

  oauthConfig.setConsumerKey("anonymous");
  oauthConfig.setConsumerSecret("anonymous");
  oauthConfig.setRequestTokenUrl("https://www.google.com/accounts/OAuthGetRequestToken?scope="+scope);
  oauthConfig.setAuthorizationUrl("https://accounts.google.com/OAuthAuthorizeToken");    
  oauthConfig.setAccessTokenUrl("https://www.google.com/accounts/OAuthGetAccessToken");  

  var requestData = {
    "oAuthServiceName": "spreadsheets",
    "oAuthUseToken": "always",
  };

  var name = DocsList.getFileById(key).getName()+".pdf";

  var pdf = UrlFetchApp.fetch("https://spreadsheets.google.com/feeds/download/spreadsheets/Export?key="+key+"&exportFormat=pdf&gid=1&gridlines=0&printtitle=0&size=7&fzr=true&portrait=1&fitw=1", requestData).getBlob().setName(name);

  return pdf;
}