GSN Games has bought Bash Gaming, a Foster City company that makes the hit social game Bingo Bash, for an undisclosed sum. VentureBeat cites one market analyst as estimating the price tag was between $160 million and $170 million. “We’re excited to become part of GSN Games, one of the early pioneers in social casino who continues to lead the space today,” Sumit Gupta, founder and CEO of Bash Gaming, said in a statement. GSN Games is a maker of social, mobile and online games. It is part…