The error is with the SD card, here are some tips:
Is the Lock slider moved from normal position, I have found that this has caused issues before when trying to read via Gparted / ubuntu Disk Manager.
Are you using the same SD card reader, this can cause an issue.
If you are able to get it read remove all partitions and create a Fat 32 Partition and then flash Raspbian or format and put NOOBS on it using the foundations instructions.
If you still can't get anything out of it then the SD card has reached the end of it's life and is dead. Possibly if you have a camera try it in there to format it (Sometimes this has worked for me).