I'm sorry, Dave. I'm afraid I can't do that.
The last bit is actually in accord with the little bit of lore in the (ugh) Manual of the Planes, which specifies that the slaad prefer the chaos to the stable areas under the control of the githzerai.Dang, that escalated fast. I'm just gonna go with what appears to be the consensus view in this thread: The githzerai and the slaadi are neither best buddies nor engaged in a war of mutual genocide, but rather follow a policy of "You don't bother us and we won't bother you."
My personal take is that the slaadi are barely even aware of githzerai citadels; the citadels are bastions of law and the slaadi are beings of primordial chaos. To slaadi, a citadel seems like a dead zone in Limbo, empty and sterile, and they instinctively avoid it. The githzerai are well aware of the slaadi, but see no reason to pick fights with them. Chaos frogs are just part of the landscape.
I resent being made to look this up in the MotP, by the way. Just sayin'. It's part of my "Nothing post-Oriental Adventures" pact.