People have complained/campaigned for it, and more recently, were anticipating it, and it looks like it's finally arrived: Metro rail and bus trips are finally functional in Google Maps!
It's exciting, but not perfect; The Militant plotted a hypothetical route from Hollywood and Western in Los Angeles' Thai Town going to Marine and Inglewood avenues in Hawthorne. What was assumed as a Red/Blue/Green trip with a possible bus transfer or walk turns out to be a trip on the Red Line, the Harbor Freeway Transitway (Metro Express Line 450), the Green Line and Metro Local Line 40. Okaaaaay, then. There's still some bugs to iron out, or at the very least, a "rail only" option as is found in Metro's Trip Planner. But you heard it here first from the Militant! So far, so good, Google -- the Militant looks forward to more!