as long as the geos aren't small enuf for the rays to have a go at them then i think they should b fine.
i've kept geos earlier with leos & things were always harmonious! geos mite have a go at each other in a group every 1s in a while, but seldom have i seen them standing up against even my red severums!!!
they really r very beautiful! they add an array of colors into the tank, minus concerns over compatibility or aggression! my two cents!
i've just ordered 2 pairs to add to my ray tank...