The Seagull driver is good, but it doesn't really work with ZebraDesigner. You will want a ZebraDesigner driver. Please make sure to download and install the drivers from GX430d Desktop Printer Support & Downloads | Zebra. Make sure to run the printer installation wizard as part of the install. I believe you will also need to uninstall the current Seagull driver using the Windows Print Management dialog.
This is the best way to ensure the output is properly in 300 DPI that the GX430d takes.
Hope this helps,
Thank you for your reply. I will give they a shot and see. I will lay post back the results. Again, thank you.