Grow OSX Partition

[Fed10]

Hello guys,
I move my dual boot on a larger SSD.
Now, using GParted I enlarged Windows partition, and I tried to move the unallocated left space near OS X partition. In GParted it's all right, but in El Capitan I've this situation:

/dev/disk1 (internal, physical):
   #:                       TYPE         NAME                      SIZE       IDENTIFIER
   0:                  GUID_partition_scheme               *500.1 GB   disk1
   1:                        EFI              EFI                    209.7 MB   disk1s1
   2:                  Apple_HFS         OS X                 119.5 GB   disk1s2
   3:                 Apple_Boot         Recovery HD      522.2 MB   disk1s3
   4:       Microsoft Basic Data      Windows10        254.7 GB   disk1s4
   5:                  Apple_HFS         untitled             125.2 GB   disk1s5

I would want to merge OS X and Untitled partition, but I don't know how.
I wouldn't want to reinstall os from zero ...

Thank you in advance!

 

[nobodynose]

If you look at gparted's feature table, you'll see that it doesn't support growing an HFS or HFS+ partition (see below). Your only option is to try to move the free space so that it's contiguous with the existing OS X partition, then delete the OS X partition, recreate it with the new size and reinstall.