GCD obtaining queue name/label

How about dispatch_queue_get_label?

In Objective-C you can log the label of the current queue with:

NSLog(@"%s", dispatch_queue_get_label(DISPATCH_CURRENT_QUEUE_LABEL));

In Swift (2.0):

print(String(UTF8String: dispatch_queue_get_label(DISPATCH_CURRENT_QUEUE_LABEL))!)