The Gyeyul (Korean: 계율종; Hanja: 戒律宗; RR: Gyeyuljong and Yul jong 律宗, or Vinaya in Sanskrit) school, founded by the Korean monk Gyeomik who went to India in 526 CE to learn Sanskrit and study the Vinaya, is the Korean name applied to a branch of Buddhism that specializes in the study and implementation of śīla (yuljang 律藏) the "moral discipline" or ""Buddhist ethics".
[2] Vinaya monk Jajang (590–658 CE), born in Silla as a true bone (jin'gol) aristocrat, revived the Gyeyul order and built the Woljeongsa temple in 643 of Jogye Order of Korean Buddhism on the eastern slopes of Odaesan in Pyeongchang County.
So, a Korean monk named Gyeomik (겸익, 謙益) was sent to India to bring back more information.
He is said to have traveled to India via the southern seas, studied Sanskrit and then came back to Baekje accompanied by another Indian monk, Paedalta (Vedatta?)
[4] Gyeomik translated these texts into Korean along with help from his disciples Tamuk and Hyerin and thus founded the Vinaya School in Korea.