PC1100 wrote:....The 1946 book Grand Central by David Marshall is an in depth description of the daily operations at GCT in that era and explains that the procedure of gateman checking tickets at the gate was a procedure that dated back to the original Grand Central Depot....
I've read Marshall's book, and besides good history, it's a fun book to read.
I have also browsed digital collections of old New York City newspapers. That's apparently true about the gatemen at old GCD, they resticted platform entry to "Ticket Holders Only." I've read many 19th century letters-to-the-editor in which some gentleman would complain that on a recent trip to Grand Central, to see off a female family member, the gateman stubbornly refused entry to the platform for the purpose of assisting with packages or non-checked luggage.
The letters usually end with a couple of snide comments directed at "the Vanderbilts."