Gauquelin set out to disprove the claims of astrologers in 1950. He ended up proving them. He never became a believer of astrology, though.
What he discovered is that certain planets are conjunct the ascendant or descendant in the charts of scientists, athletes, writers, etc. The results were as follows:
Mars: Scientists, doctors, athletes, executives.
Jupiter: Team athletes, soldiers, politicians, actors, journalists, playwrights.
Saturn: Scientists, doctors.
Moon: Politicians, writers.
Of course, he only confirmed what astrologers already knew.
In my chart, both Jupiter and the Moon are conjunct the descendant - in Gemini no less. And Neptune is conjunct the ascendant.