Nitpick: it's Colombia, not Columbia. And the last name is Garcia Marquez. Splitting half of the last name is not generally done. It sounds like calling somebody called McDonald just Mac.

Just expanding on this. In hispanic countries we have two last names. One you get from your father side and the other one you get from the mother side. When the first last name is very common like Lopez, Garcia, Perez, etc. it is common practice to keep the second last name when you are talking about them. Otherwise it sounds too plain. Like Gabriel Garcia could be anyone, but Gabriel Garcia Marquez is a renown author.