This is the 8526th most frequent Korean word.
가가는
"가가는" is not a standard Korean word; it may be a typo or fragment.
Here '가가는' is used to describe an intermittent action performed by the subject (Cheolsu).
철수가 가가는 길은 산길이다.
The path that Cheolsu is intermittently choosing is a mountain path.
In this sentence, '가가는' denotes occasional visits made by the subject (him) to the described store.
그가 가가는 가게는 유명하다.
The store he occasionally visits is famous.
Here, '가가는' implies a kind of periodic or patterned attendance by Gato to the mentioned school.