The initial driver location for the WSCA Model GS3 is located here.
The GS4 was configurable with two different motherboards and thus the driver stack for each differs, you will need to determine which motherboard your system has before proceeding.
The drivers for the SE915GAGL are available for Windows XP.
The drivers for the SE865GLCL are available for Windows XP.
These drivers are tested by CTL to work with the operating systems that are configured for these systems.