Gabrielle Jamison appears to be a friend or acquaintance of Travis Kelce, as she shared a photo of her family posing with Travis Kelce and Taylor Swift at a Chiefs game, indicating some level of social connection or friendship. There is no indication from the information found that Gabrielle Jamison has a familial or romantic relationship with Travis Kelce; rather, she seems to be part of his social or extended circle, possibly connected through family or friends.