I think I might actually have found the drivers (after some serious searching), I found a list of someone's ftp action and searching for those files and found them.
Now I just have to test it (hope it works as then I will have a small pile of 8-bit ISA network cards)
For future people looking for info, this seems to be the list of files (I will upload the files somewhere easier to find later) :
**** Gateway Ethernet - \PUB\ADAPTERS\GATE
ADF.ZIP 1K G/Ethernet ADF file for PS/2.
AS400.ZIP 4K Sample files for AS400 installations, using ODI or NDIS.
G2000-01.ZIP 80K Setup and driver for G2000 with assy# 82500085-01
G2000.ZIP 81K Drivers for Gateways NE2000 Compatable NIC.
GECHX.ZIP 21K Diag Program for G/Ethernet boards with NAT-SEMI Chipset
GEEISA.ZIP 78K Config and Driver for Gateways 32 bit Busmaster Ethernet NIC
GELANDRV.ZIP 176K LAN_DRV_207 Disk for NAT-SEMI Chipset NICS. Unzip using -d
GEMCBM.ZIP 71K Gateway Micro Channel Busmaster Driver
GEMCBR.ZIP 15K Older Driver for G\Ethernet MC External Bridge
GENDIS.ZIP 15K NDIS Driver DOS, OS2 NAT-SEMI Chipset, WWG
GEODIWS.ZIP 75K ODI Drivers for 8, 16 and MC NICS with NAT-SEMI Chipset
GETCP.ZIP 13K Standalone TCP Drivers 8, 16 & MC NICS. Nat-Semi Chipset.
GEWFW311.ZIP 76K Windows for Workgroup with ODI Drivers. Nat-Semi Chipset.
GLAPCARD.ZIP 122K G/Lapcard Drivers. (PCMCIA)
GNETFS21.ZIP 18K Gateway propreitary network card Netware 2.X F/S files
GPOCKET.ZIP 164K G/Pocket Drivers.
GQLANDRV.ZIP 157K Complete LAN_DRV_207 disk. Fuji Chipset. (Use pkunzip -d)
GQNDIS.ZIP 13K Ndis Driver, DOS, OS/2. Fuji Chipset Only.
GQODIWS.ZIP 56K ODI WS Drivers for 8, 16, and MC NICS. Fuji Chipset.
GQTCP.ZIP 8K Standalone TCP Drivers for 8 & 16 Bit Nics. Fuji Chipset.
GQWFW311.ZIP 66K Windows for Workgroups using ODI Drivers. Fuji Chipset.
SWITCHES.ZIP 27K Jumper and Switch settings for Gateway Ethernet Boards.
WNT.ZIP 57K WINDOWS NT BETA DRIVER FOR GATEWAY 16 BIT BOARDS