Yes, like Curlypriya said, that product is CG safe. To elaborate, PEG or PPG in front of a silicone means it's been modified to be water soluble. That means it will cowash out and is safe to use on a strict CG, cowashing only regimen. You usually see the PEG or PPG followed by a number, like your PEG-12 Dimethicone.
CG since 11/2011
2c /3a F /Mii, low porosity

Autumn Products /Routine:
Clarifying: Herbal Essences Tealightfully Clean, Suave Professional Deep Clean Peppermint
Low Poo: Renpure Luxurious Argan Oil
Co-washes: VO5 Kiwi Lime Squeeze or Strawberries & Cream
Tresemme Expert Selection Perfectly (un)Done, Cure Care, VO5 KLS
LI (if needed):
Tresemme Perfectly (un)Done, VO5 KLS, Cure Care
Stylers: FSG, L'Oreal Clean gel, Tresemme Flawless Curls Bouncy Curls, LALSG, HETT, AIF
PT: IAGirl's as needed