OOPS! That's the name of the solvent. Most hardware stores have it. Works good and won't harm the gel.
Good call on the Goo Gone,Sacandaga said:Goo Gone works great. WalMart carries it in a varity of sprays, gels, etc. A hairdryer works great to pull off the decal, then use the Goo Gone to clean up any left over sticky stuff. I've used WD-40 in a pinch, followed by Glass Cleaner too.