As far as I can tell from Bing aerial imagery, the gate still exists.

The problem here is the separate sidewalks added by @alisonlung. They were added by a user with a task manager determined to "complete" sidewalks in a map square. Unfortunately, they made no effort whatsoever to connect the sidewalks via crossings or do anything else beneficial for routing. I'd be inclined to delete the sidewalks and reinstate the gate.