Well now that I have ordered my 2 4G sticks of Ram for my Gateway laptops and I can report back that I was successful on two of three Gateway to get them to recognize and run with the 8G Ram.
Gateway P-6860FX W7x64 will run and recognize the 8Gigs of RAM.
Gateway NV52 W7x64 will run and recognize 8Gigs (7.75Gigs usable).
Gateway M-6862 W7x64 comes on but will not boot to windows so no go.
So that is my report so far I will take the 8G and place those into the P-68 as that will be the power house desktop replacement and maybe in the future order another pair for the NV52 when they go back on sale for the RAM. Why the M-68 is a no go could be the chip-set architecture. But at least I know the limits but wised the M-68 would go 8Gigs would've been nice to have but I can live with it.