Pasting text from GoogleDocs into D7 Body field causes imagestyle error?
You may have better luck exporting the Google Doc to "RTF" format first then copy + pasting that format into the article body.

You could also try the "Paste without formatting" option, such as Ctrl+Alt+Shift+V or Ctrl+Shift+V but would need to re-add the formatting (headings etc..) with that approach.

There may also be some WYSIWYG toolbar options to paste with various formatting options (paste from word, paste as plain text etc..)