Answer:
Besides Nick, only a few people attend Gatsby's funeral, including a few servants, the West Egg postman, the minister overseeing the service, Owl Eyes, and most tragically, Henry Gatz, Gatsby's father. Other people who associated with Gatsby in life—like Wolfsheim, Daisy and Tom, and all his partygoers—apparently do not care about the man enough in his death to attend his funeral.