Distribution of [Al/Fe] vs. [N/Fe] for all stars used in our analysis, which all have been chosen to be of high metallicity ([Fe/H] > − 0.7 ). Also included are KDE models and contours showing the density of objects belonging to the MW stars (black contours), dwarf galaxy populations (purple contours), GC populations (red contours), and the newly identified population—the GCD stars (blue contours and circle symbols). Stars among the GCD are also overlaid with dot symbols with color-coding based on their [Fe/H]. The background green to blue color highlighted by the inset bar indicates the significance of the GCD stars as compared to the background density level.