Shares of Google Inc. rallied Friday, reaching an all-time high. The stock was up more than 2% to $774.70, after hitting an intraday high of $775. The stock hit a previous peak of $774.38 in October 2012. The search giant’s shares were up more than 9% for the year to date and have risen more than 12% over the last three months. Google reported better-than-expected results two weeks ago, highlighted by a surge in revenue.