Grede Holdings LLC has purchased GTL Precision Patterns for an undisclosed price, the company has announced. Grede operates 13 foundries and two machining facilities in six states. GTL, based in Biscoe, NC, will become the third machining facility in Grede’s portfolio. “GTL has machined castings produced at our Biscoe foundry for many years, so now Biscoe becomes a full service cast and machine operation…