What network device???? You won't find drivers posted on the Gateway website looking for "03-DT009-01X". Try using 600 Series, 610 model, and you might have some luck.
It doesn't look like they provide very many drivers for this unit so you might need to use Everest:
To find make and model of pc hardware, EVEREST Home Edition
is a free system diagnostics, system information program that will id most hardware on-board a mb. as well as the actual motherboard. It will, in some cases, actually provide a download link for the driver.
Alternate Everest download link: (offers 2 sites to dl program from)
Run the program and then:
Click on Computer
Click on Summary
Right hand window (hardware) if the text is BLUE
this is a link to the web site for that particular hardware.
If you have additional questions or need further help, please post a "copy and paste" of the COMPUTER SUMMARY report
(Leave out the Debug–PCI section) from Everest.