I finally got all Gold Licenses today after playing GT4 for about a year, accumulated 822 cars, 109,099 A-spec points, driven 53,000 A-spec miles, garnered 2,800 some odd trophies.
I had two stinking license tests I couldn't beat for all this time. A simple BMW slalom and the final Nissan RC92 at Sarthe section (I kept smoking the tires too much). I purchased a new PS2 dual-shock controller and I spent a half-hour between the both of them and finally aced them. Adios. Finally, 80 stinking Golds. Woohoo!
I'm not even that good at knocking down stupid cones on the License Coffee Break. What pathetic driving skills!