Resizing ubuntu partition

installed Ubuntu 12.04 on Vista SP2 from external drive.

Output of fdisk -l at Ubuntu terminal as follow:
----------------------------------------------------------------------------------/
Disk /dev/sda: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders, total 312581808 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: "omitted"

Device ---Boot --- Start --- End --- Blocks--- Id--- System
/dev/sda1 --- * --- 2048--- 312578047 --- 156288000--- 7--- HPFS/NTFS/exFAT
----------------------------------------------------------------------------------------------------------/
Now I do not see windows.

I looks like Ubuntu instillation created a logical partition within the original partition.

Can Ubuntu be resized (increased) via GParted from Ubuntu or windows?