NEVER ever use green coolant in gold fill.
The radiator type is made from different materials! When you put the green coolant in the radiator it literally acts as an acid to the radiator and it will leak. Plus if there is any bit of residue from the gold coolant, it will cause even more damage.
Here's more info on why NOT to use green:
The Motorcraft Premimum Gold Engine Coolant is Zerex G-05, I am told. Acording to Valvoline's Zerex G-05 product page, The G-05 "Utilizes hybrid Organic Acid Technology to minimize inhibitor depletion" and is a "Low-Silicate, Low-pH and phosphate-free formula" it is virgin ethylene glycol based, it comes in concentrate and Ready-to-use (premixed) packages. It meets Ford WSS-M97B51-A1 spec. Behind the MSDS/Product Info section menu, there are GREAT detail specs for this product.
An extended life coolant will cause injector and water pump seal deterioration, by reacting with some brass compounds and some silicon-based seal materials. Coolant must meet ESE-M99B44-A spec ON V8 MOTORS BUILT BEFORE Feb. 2, 1999. After that date, Texaco ELC Ethylene Glycol colored raspbery red (Organic Acid Technology) is OK for up to 150k miles, 30 months, then add extender to get another 150k, 30 months.
Ford also does not recommend nor endorse Propylene glycol based coolants, although it says warranty is not automatically voided upon the use of a coolant made with propylene glycol, if such use results in damage to the vehicle or its components, the cost of repair will not be covered by warranty. TSB 01-23-06