I do not know encryption, but wonder if that is part of the issue. I believe the .private is part of the encryption. All the tmpfs are temp files created by the system.
Resizing your encrypted file system can not be done directly as of yet with Gparted as Gparted sees the encrypted partitions as unformatted space.
How to: Resize an Encrypted Partition (LUKS)
How to Resize a LUKS Encrypted File System.