According to the Gateway website, the wireless is probably a Broadcom BCM4318E...

I thought the Broadcom wireless cards were all well-supported in 10.5.1. My Compaq laptop has a Broadcom BCM94318MPG wireless mini-pci card and it worked right of the bat with Zephy... (OSX called it an "AirPort Card" - hee, hee...)

Here's the URL for the motherboard specs:
http://support.gateway.com/s/Mobile/Q106/Bishop/4001189R/4001189Rsp4.shtml

The onboard LAN adapter is the infamous PHY8201 ( Realtek RTL8201CL ) that may be tricky - I haven't been able to get mine to work... Others use "forcedeth" or one of it's variants. Since yours is a laptop, you'll need to go to the gurus and get this working.

The audio is a SigmaTel 9200 - I've never heard of it. You'll probably have to search InsanelyMac...

Gateway.com has all sorts of interesting information...
http://support.gateway.com/s/Mobile/2007/Apache/1014552R/1014552Rnv.shtml 1 to 11 of 11

---

Running both 10.5.8 and 10.6.4 on my stinking AMD/ATi machine...