2 things. You need to turn off
under the router rip process (see below) and your G0/2 interfaces connecting to the switch to form neighbors is all the same IP address. They cannot be the same IP because then the router thinks the update is coming from itself and will discard it.
R0-G0/2: ip address 10.0.0.1 255.255.255.0
R1-G0/2: ip address 10.0.0.2 255.255.255.0
R2-G0/2: ip address 10.0.0.3 255.255.255.0
Also make sure they are in the same subnet with appropriate mask. Since you don't have the 10.0.0.0 network anywhere else I would just use
Under the Router RIP configuration turn off the
Hope that helps