Looks normal at first glance, though I don't have a Gio to compare with.
You could try and dig into how these phones are partitioned exactly and go from there, but you'll probably be on your own since most people who were interested in early MSM7227 devices have moved on.
Unless the underlying memory is defective, it's possible your only option left at this point is to try a JTAG repair.
However, depending on how much you'd be charged for such an operation locally, and taking into consideration the value of your typical used Gio (I've seen them go for 50$CAD in local classifieds)... You're probably better off cutting your losses and getting another phone.
Sent from my SGH-T889V using xda app-developers app
My phones: Galaxy Note II SGH-T889V (with LTE enabled
/ ext4 SD card support on TouchWiz ROMs
Previous phones: Nexus S GT-I9020A, Galaxy Gio GT-S5660M (Arpeggiomod ROM
/ Discussion, stock rooted ROM
Phones for which I play "tech support" for family and friends: Galaxy Nexus GT-I9250, Galaxy Q SGH-T589R, Galaxy 551 GT-I5510M, LG C-800G Eclypse
- Level 8