This is the 14th most frequent Urdu word.
گیا
"Gaya" in English means "went" (past tense of go).
In this sentence, 'گیا' is used to describe an action of going to a place to perform an activity, which is reading in this case.
میں کتاب پڑھنے گیا۔
I went to read a book.
Here, 'گیا' expresses becoming settled or being in a state when returning.
واپسی پر بس گیا۔
I got settled on my return.
In this sentence, 'گیا' is used in a passive construction, indicating that the action of harvesting was performed.