Welcome to the community, @Lane_Feng! :grinning_face_with_big_eyes: Unfortunately the gallery view doesn’t provide that option. It’s designed to show a consistent card-style layout across all records. In fact, all view types maintain a consistent field display for all records. If a field is hidden, it’s hidden for all records in that view. Some third-party services that format Airtable data for display might have the option of hiding empty fields for individual records, but I don’t have experience with such tools to say for sure.
On a side note, I’m not sure what you mean by “raw.” Are you referring to a row (record)?