It is the past tense of the Tagalog verb "manggaling," which means "to come from."
Here are some examples of how "nanggaling" can be used in a sentence:
* "Saan ka nanggaling?" (Where did you come from?)
* "Nanggaling ako sa bahay." (I came from home.)
* "Ang kwentong ito ay nanggaling sa aking lola." (This story came from my grandmother.)