TOKYO, Nov 5 (Reuters) - Japan’s Government Pension Investment Fund (GPIF) said on Friday it posted a second-quarter investment return of 1.88 trillion yen ($16.54 billion) due to gains from Japanese stocks. GPIF, the world’s largest pension fund, managed 194.1 trillion yen of assets as of end-September and its return on overall assets was 0.98% over the three month period, it said in a statement. $1 = 113.6500 yen Reporting by Makiko Yamazaki; Editing by Jacqueline Wong