Gentrified : Renovate and improve (esp. a house or district) so that it conforms to middle-class taste.

In the reading assigned to us “Who knows Brooklyn”  it said  “I do neighborhoods that aren’t, like, all gentrified,” he said of his scholarship.

I think in this context it means to change the place from being a poorer place to a richer one, by people of a higher class moving to live there.

Resource: http://www.merriam-webster.com/dictionary/gentrification