Mercury is the lord of Gemini and it shares an almost friendly relationship with Saturn. Saturn here affects the judgment of the person since Mercury is the significator of wisdom. Such people tend to be deceptive at times. It also makes the native vulnerable to addiction. These natives tend to become mean and selfish at times. Saturn in Gemini also gives a tendency to wander a lot. These people lack stability and organization in life. In fact, they lead quite a messy lifestyle.
Saturn in Gemini makes the person narrow-minded too. This placement of Saturn also gives the native interest in chemical and mechanical sciences. Such people are quite systematic and logical in their approach. They have exceptional reasoning ability. They are quite resolute and have good problem solving skills. They always make a move only once sure of the outcome. They never get the jitters in critical situations and face problems in a cool and collected way. However, they do face difficulty in processing new information. Discussion helps them understand things better and reach to a conclusion.