If your pc is not your dedicated server and your pc does not have a static IP, then I will recommend you to install the GMTool on the dedicated server, because if not every time your IP change you will need to restart the server to allow the GMTool connect to dbsrv.
NOTE: this is for K5.2+
If your IP is static (don't change) then you need:
- add your IP on the Admin.txt
- allow SQL to accept remote connections **
- on your PC add the ODBC for connect to TantraGame DB and test if connection is success
** be careful when doing this because if you allow it for any IP your database can be hacked.