Some G4 firmwares have support for the GeForce2 MX400 ( Device ID 10de,0110 ), however a lot of GeForce2's have lower spected RAM and GPU speeds, so you may end up with a garbled screen on an unflashed card, because the MX400 supported higher clock speeds.
PCI Base Address+ 0x0500 ( GPU Mhz )
PCI Base Address+ 0x0504 ( VRam Mhz )
If that's the case, then you'll need to edit these two addresses in the FCode ROM and flash it to your card.
Also, the QuickSilver has support for the GeForce 4MX( NV17 GPU ), so those can work without flashing, however you may run into the same clock speed issues.