What is "grandfathered"

vb. (en-past of: grandfather)

Grandfathered is an American comedy television series created by Daniel Chun. Originally titled Grandpa, the show was picked up to series by Fox on May 8, 2015, and premiered on September 29, 2015. On October 15, 2015, Fox ordered an additional six scripts for the first season. On October 28, 2015, Fox ordered a full season of 22 episodes for the first season. Fox canceled the show on May 12, 2016, after the first season.