게 몰리다

crowd in, in large numbers

몰리다 is people or things being driven together into one place — prospectors flocking to a gold field, a district where the population piles up, people living packed tightly together. The -게 slot gives the degree: 엄청나게 (enormously), 빽빽하게 (densely), 기가 막히게 (astonishingly). All four lines here are about crowding rather than any other sense.

Register: neutral