With the Gemini 4th house as your 7th house (Using Asc Ruler house as the 1st house), the marriage (7th) will take place in the homeland (4th). Gemini indicates your local neighborhood, where you lived as a child. The partner (7th) will be homely, nurturing, protective of family (4th) will talk a lot, do many things at once, loses interest in things fast, love to learn/teach, have a youthful, vibrant spirit, flighty at times, a brainiac/have a useful mind (Gemini)
I look to the Moon which represents the wife. You have Moon in Libra 8th as 11th house. To understand what the 8th as 11th house is you may visit http://mjastrology.blogspot.com/p/discover-true-houses.html
It is simply using the Ascendant Ruler as the 1st house and counting onwards from there. In your chart the 8th house is identified as your true 11th house, with the Moon therein.
Moon in Libra- the wife (Moon) is attractive, pleasant, harmonious, sociable, cooperative, moody, either well-balanced or totally imbalanced (Libra)
With Moon in Libra the wife does not have a strong ego. She will want to please others and blend in. Libra is the sign of Others, opposes the Self. If she is surrounded by positive people they will have a good effect on her. The wife will not enjoy personal time to herself. She is attached to people.
Libra represents your Partner as it represent Others
Libra 8th as 11th- the partner (Libra) is socially aware, has many friends, popular/loved by many, loves to be a part of a group (11th) that is occult, not accepted by general society, intense and powerful, deep, maybe destructive/life-changing (8th)
The partner (Libra) may be active on social media, belonging to a group cause (11th) involving 8th house matters such as her obsessions, life-changing matters, investigations, deep psychology, medicine, spiritual healing, surgeries to enhance beauty/appeal (8th)
The Wife- To the world (11th) you are a deep, secretive, mysterious, sexual, powerful (8th) partner (Libra)
With Moon in 8th as 11th, the wife may have a child already.
Your other children, step children (11th) belong to someone else (8th)
8th as 11th shows you have step-children or children by more than one partner
With your Sun in Libra, the partner (Libra) will identify you as a King (Sun/husband) and treat you as such. During the day when the Sun is in full effect you will have the most power and she will hold the power during the night (Moon/wife).