It's profilelogo_guildname_randomnumbers.jpeg now.
There is no way to predict the numbers at the end, so if you want to get the filename to use it in your status, you will need to get it through the game's files somehow.
You don't need to delete the thread, though - other people have had (and will still have) this question. Maybe in the future they'll find this thread instead of making their own to ask the same question.