Gemini Venus

I have Sun Taurus and Moon Taurus and Gemini Venus.

Would it have much influence over the dominant Taurus placements.

if so, what effect would it have?

Venus represents what you love and it's in gemini. This might mean you find gemini attractive. It may also mean you like verbal reparte in relationships. You might be a bit coquettish in relationships at the beginning. A lot of how the energy can play out depends on the aspects Venus makes in your natal chart and the house it resides in. I think it's a feather in your cap to have Venus in Gemini as it will balance out the earth. I have Venus in Gemini in my 1st house. Lends a dose of charm to my personality. Downside-Venus is opposing Mars in the 7th house, which can make for combustible relationships. I kinna do and don't relate to that aspect. We're not all light and rainbows and cotton candy.