Does Green Dot Speed Calculation include banking Angle?
The Green Dot speed is very stable on the PFD, unlike for example VLS which is a function of G (bank included), mach number and speed brake position.
According to Flight Crew Ops Manual(s) green dot speed varies only as a function of aircraft weight and altitude. For A320 a very crude formula is given: below 20000ft 2 x weight in tons + 85kts, above 20000ft add 1kt/1000ft.
Based on experience I would say FCOM is accurate on this matter. It wouldn't be the first time the whole truth is not revealed to the pilots, though :)