This is an entry in our Disneyland 101 Glossary: Disneyland Resort definitions in under 101 words, from Mouse Brief.
Good Neighbor Hotels is a category of hotels near the Disneyland Resort. These hotels are not owned or operated by Disney, and they are not located on Disneyland Resort property (though some are directly across the street). They have entered a partnership with Disney that allows them to be listed on the Disneyland website and to offer guests vacation packages that include park tickets.