I just confirmed that the Tarantino-Rodriguez team-up GRINDHOUSE will not be coming to Korea. But you will be able to see both of their films.
Yes, Quentin Tarantino's DEATH PROOF and Robert Rodriguez's PLANET TERROR will be released as two separate films in Korea (as in all international markets, I think). DEATH PROOF is making its debut at Cannes this year, so international markets have been waiting for that before getting the film.
Here in Korea, DEATH PROOF should be coming in July, followed by PLANET TERROR some time in August (this summer is so packed with big films that their distributor, Sponge House, is still selecting the best dates for each).