Gulf Energy Development Pcl said on Tuesday it acquired a 50% stake in a German offshore wind farm for about 558 million euros ($631.10 million) in the latest overseas investment by Thailand's second-largest power producer.Gulf Energy said acquiring the stake of the Borkum Riffgrund 2 Offshore Wind Farm (BKR2 Project), which has an installed capacity of 464.8 megawatts (MW), was in line with the company's strategy to expand its renewable energy business…