I don't know how swappable the motherboards but I'm not sure the GX 110 would work. All the PCI and ISA slots are on a riser card in the GX1 and the slot openings on the back are horizontal rather than vertical. That might make a difference if the GX 110 has vertical slot openings.
The GX1 is nice though because you can use a slocket adapter to bring the CPU up to 1.4ghz using a socket 370 Celeron or PIII and you can install 768MB RAM and use a reasonably recent PCI video card. You get 5 expansion slots but two of those can be either PCI or ISA, not both. In other words the riser card has 7 slots, 5 PCI and 2 ISA but only 5 can be active at the same time as the 2 ISA slots share the bus with the last two PCI slots. You can install a DVD burner in them and a card for PCI 2.0 and Firewire and faster ethernet than the built in 10/100 or a Wi-Fi card. They are also very sturdy and you can rest a good sized monitor on top of them without breaking anything. They are also very easy to access with two buttons on either side that you press in to lift the cover off. The whole design is almost as nice as the Powermac 7500.
The GX1 is nice though because you can use a slocket adapter to bring the CPU up to 1.4ghz using a socket 370 Celeron or PIII and you can install 768MB RAM and use a reasonably recent PCI video card. You get 5 expansion slots but two of those can be either PCI or ISA, not both. In other words the riser card has 7 slots, 5 PCI and 2 ISA but only 5 can be active at the same time as the 2 ISA slots share the bus with the last two PCI slots. You can install a DVD burner in them and a card for PCI 2.0 and Firewire and faster ethernet than the built in 10/100 or a Wi-Fi card. They are also very sturdy and you can rest a good sized monitor on top of them without breaking anything. They are also very easy to access with two buttons on either side that you press in to lift the cover off. The whole design is almost as nice as the Powermac 7500.