Dale, sadly, CNW scrapped the ex-CGW GP30s in the late 80s. The were going to rebuild them, but funding was never given to rebuild them. CGW GP7 120 was caught in the Chicago Roundhouse fire and rebuilt by EMD as a GP7/9m in 1956. when rebuilt, it was given a GP9 long hood and battery box. Well, a GP7 batterybox has louvers where CGW normally put the road numbers on its GPs, as a result, the "real" GP7, #121 had its number on the long hood, but when the 120 was rebuilt w/ some GP9 parts, there were no louvers and CGW put the number where it was on the GP30s / SD40s.
120 became CNW 4337, and it's currently MRL 115.
121 became CNW 4338 and in 1985 CNW traded it in to EMD (along with a bunch of other Geeps) in an order for SD50s.