I use to selenium tone Ilford Gallerie (graded FB, glossy). There was a slight tone change and a slight bump in contrast as the blacks got just a touch blacker. But it was subtle and one needed to have two identical prints, one toned and one not toned, to be able to compare them.
I toned Ilford Gallerie primarily for archival purposes, but did like the fact that the paper got just a touch cooler (to my eye the paper was slight warmer than neutral and the toning brought it back to neutral (I develop in Dektol).
If you would like a color change on your Ilford RC paper, try sepia toning -- one can even follow that with selenium toner for additionl colors.
Vaughn