Example on how to export a Google sheet to various formats, includes most PDF options. Updated from comments in [Spencer Easton's Gist](https://gist.github.com/Spencer-Easton/78f9867a691e549c9c70)

exportSpreadsheet.gs

function exportSpreadsheet() {
 
  //All requests must include id in the path and a format parameter
  //https://docs.google.com/spreadsheets/d/{SpreadsheetId}/export
 
  //FORMATS WITH NO ADDITIONAL OPTIONS
  //format=xlsx       //excel
  //format=ods        //Open Document Spreadsheet
  //format=zip        //html zipped          
  
  //CSV,TSV OPTIONS***********
  //format=csv        // comma seperated values
  //             tsv        // tab seperated values
  //gid=sheetId             // the sheetID you want to export, The first sheet will be 0. others will have a uniqe ID
  
  // PDF OPTIONS****************
  //format=pdf     
  //size=0,1,2..10             paper size. 0=letter, 1=tabloid, 2=Legal, 3=statement, 4=executive, 5=folio, 6=A3, 7=A4, 8=A5, 9=B4, 10=B5  
  //fzr=true/false             repeat row headers
  //fzc=true/false             repeat column headers
  //portrait=true/false        false =  landscape
  //fitw=true/false            fit window or actual size
  //gridlines=true/false
  //printtitle=true/false
  //pagenum=CENTER/UNDEFINED    CENTER = show page numbers / UNDEFINED = do not show
  //attachment = true/false     dunno? Leave this as true
  //gid=sheetId                 Sheet Id if you want a specific sheet. The first sheet will be 0. others will have a uniqe ID. Leave this off for all sheets. 
  //printnotes=false            Set to false if you don't want to export the notes embedded in a sheet
  //top_margin=[number]         Margins - you need to put all four in order fir it to works, and they have to be to 
  //left_margin=[number]          2DP. So 0.00 for zero margin.
  //right_margin=[number]
  //bottom_margin=[number]
  //horizontal_alignment=CENTER Horizontal Alignment: LEFT/CENTER/RIGHT
  //vertical_alignment=TOP      Vertical Alignment: TOP/MIDDLE/BOTTOM
  //scale=1/2/3/4               1= Normal 100% / 2= Fit to width / 3= Fit to height / 4= Fit to Page
  //pageorder=1/2               1= Down, then over / 2= Over, then down
  //sheetnames=true/false
  //range=[NamedRange]          Named ranges supported - see below
 
  // EXPORT RANGE OPTIONS FOR PDF
  // Use these options or ...
  //gid=sheetId                // must be included. The first sheet will be 0. others will have a uniqe ID
  //ir=false                   // seems to be always false
  //ic=false                   // same as ir
  //r1=Start Row number - 1    // row 1 would be 0 , row 15 wold be 14
  //c1=Start Column number - 1 // column 1 would be 0, column 8 would be 7   
  //r2=End Row number
  //c2=End Column number
  
  // ... just use A1 notation
  // &range=Y1:AZ25&...
 
  var ssID = "12g8-tcRwFkcL7El...XdQAzSR7v8-geIR6r-IY";
  var url = "https://docs.google.com/spreadsheets/d/"+ssID+"/export"+
                                                        "?format=pdf&"+
                                                        "size=0&"+
                                                        "fzr=true&"+
                                                        "portrait=false&"+
                                                        "fitw=true&"+
                                                        "gridlines=false&"+
                                                        "printtitle=true&"+
                                                        "sheetnames=true&"+
                                                        "pagenum=CENTER&"+
                                                        "attachment=true";
                                                        
  var params = {method:"GET",headers:{"authorization":"Bearer "+ ScriptApp.getOAuthToken()}};
  
  var response = UrlFetchApp.fetch(url, params).getBlob();
  // save to drive
  DriveApp.createFile(response);
  
  //or send as email
  /*
  MailApp.sendEmail(email, subject, body, {
        attachments: [{
            fileName: "TPS REPORT" + ".pdf",
            content: response.getBytes(),
            mimeType: "application/pdf"
        }]
    });};
  */
  
}

Additional options: https://gist.github.com/Spencer-Easton/78f9867a691e549c9c70?permalink_comment_id=4379138#gistcomment-4379138

When creating a PDF from Google sheet with the above gs code, Unicode characters like U+1F7E5 (anything U+FFFF or greater) do not display. Anyone know how to fix this?