Found it.
What should I do next
1. Install the the Goldcoin client on a working machine and then close the application.
2. Navigate to \users\<username>\appdata\roaming\Goldcoin (GLD)\ and rename the default wallet.dat file to wallet.old.
3. Copy the recovered file to above directory, restart client, and allow it to sync with the network.
Once the client fully syncs with the network, the balance of the recovered wallet will become available.