Have no idea about where the Graduate Center of CUNY is? Well, don't worry. Let's take a step-by-step approach. I am sure you've heard of New York City, a place that the local people call "the capital of the world". Once you get to the city, you can easily find the highest building on the Manhattan Island - currently the Empire State Building. The Graduate Center of CUNY is right across the intersection of 5th Avenue and 34th Street from the skyscraper. Maybe the 1935 picture below can help you:

Here is another nice picture showing the building of GC-CUNY.