Out of gamut

[b60]

Gimp 2.8, using soft proofing via Color Management in Edit. I set the monitor profile and the ICC values for the printer and paper. The printer I use uses only sRGB. On some of my photos there are quite a bit of out-of-gamut sections. is there a fix for this? I've read that converting to CMYK and then back to sRGB will solve it, but I don't know how to do this in Gimp?

Thanks in advance for any help!