A thing to remember here is that these posts are strictly meant for the particular planet position. Like, today we are looking at Rahu in Gemini, so the description given here may change for you if your Rahu is although in the sign of Gemini but with conjunction with or aspected by other planets. --

Rahu represents illusion, foreign lands, foreign things (foreign as in unknown things. So, for someone living in Punjab, culture and rituals of Kerala is also unknown and hence Foreign), Drugs, Medicines, any type of intoxication, fame, wealth, success, obsession, past-life left-over karma, movies, television, online world, cheating, imagined fears, unusual things, unique things, creativity, rule breaker. Rahu also blows things out of proportions.

Gemini is the 3rd sign of zodiac belt, so it represents many things related with 3rd house of horoscope like, Communication Skills (either written, oral or even by sign language), Marketing, Business etc. It is a sign basically related with communications and business ideas. Gemini is divided into 2 and half nakshatra of Mrigashira, Ardra and Punarvasu. Gemini's lord is Mercury, which is significator of Communications.

One thing we have to remember with posts related with Rahu through Signs is that Rahu converts himself as the lord of the sign it is sitting in and then amplifies quality of lord. Like, when Rahu is in Gemini, Rahu will take all the qualities of Mercury (Lord of Gemini) and then will amplify those qualities out of limit. Rahu also does same to the planet it is sitting with. Like, if Rahu is with Saturn then it will take all the qualities of Saturn and blow them out of proportion during Rahu MD or Saturn MD. It is always better to have Rahu alone in a house rather than conjunct with a planet. Another thing with Rahu is that recently I have come across of the view that Rahu and Ketu don't have aspects on 5th or 9th house, for the simple reason that they are shadow planets and for aspects you need a sight not shadow. I am yet to verify it on at least 50 charts, so for now I will continue with traditional approach of 5th and 9th aspects of Rahu. Ideal placement for Rahu is to sit with an exalted planet, then it takes all the qualities of the exalted planet and amplifies them.

When Rahu is in Gemini, person wants to communicate all the time. They want to interact with people. As Rahu always wants to be the best, here in the sign of Mercury, this person wants to be the best in communications. He wants to be the best in marketing and business. So, all the traits and qualities of Mercury, Rahu wants to perfect those. But here is one twist in the story. Rahu is basically a malefic planet and Mercury is all about speech and communication. So they can either using foul language or speaking lies. They can also blow up small things with communications. In today's online world and age of blogging, this position can easily make a person blogger or someone who communicates through online world.They can also be interested in travelling related business. Overall, a great position for any work related with communication. There are two ways to look at the results of all these acts. Some people say that all these acts are paying them money in the end, hence they are doing it. I feel that money is the most natural outcome of any work. You do any work in this world and you will get money. There is no work in the world which doesn't pay you back. So, I feel that the basic fact that they are dedicating themselves to a higher cause is meaningful and most important. Money is an outcome which is bound to come.

Now, where does these things differ for different people born with Rahu in Gemini. It depends on the Nakshtra Rahu is placed in. So, if Rahu is in Mrigshira Nakshatra, then it will be impacted by Mars as Mars is its lord. If Rahu is in Ardra Nakshatra, then it is in own nakshatra as Ardra is ruled by Rahu only. If Rahu is in Punarvasu Nakshatra, then we need to check Jupiter's position.

Sign lord wise, Mercury is lord of Gemini. So, to really assess results of Rahu in Gemini, we need to see how Mercury is placed.