Rahu-Ketu is considered a shadow planet. It has been imagined from the snake. Rahu is considered to be his torso and Ketu tail. Rahu Ketu does not have its own effect. They increase or decrease the fruit according to the zodiac sign in which they sit and the planet with which they sit.
Rahu in Astrology: Gemini's high zodiac sign is Gemini, so it does not give bad results when it is in this zodiac sign. It is considered similar to Saturn, so it does not give bad results even if Saturn is in the zodiac sign (Capricorn, Aquarius).
Rahu is the factor of third, sixth and tenth house respectively, so here it gives auspicious results only. Especially its influence on the tenth house makes Raja Yoga and gives success in politics.