No. The Catholic Church does not approve of same-sex marriage. It does not permit its clergy to perform same-sex weddings, or any similar ceremony involving a same-sex couple. Such ceremonies are not allowed to take place on Church property. Neither does the Catholic Church recognize same-sex marriages.
In some places where required by law, certain secular organizations affiliated with the Church (e.g., Catholic Charities, Catholic Hospitals, Catholic Immigrant Services, etc.) do, to the extent required by law, treat all civil marriages the same, including same-sex marriages, but this is for business and social-services purposes only and not intended as a religious approval of these relationships.
Asking them.
You're always welcome in the Catholic Church. However, if you've received a civil divorce and are married to someone else without having your first marriage annulled, you cannot receive the Sacraments because the Church still views your first marriage as valid and you, therefore, as living in a state of serious (mortal) sin.
You should be ok. Many of them welcome all and don't bar anyone in particular from marrying in the Church provided you can afford the service. If you were baptized Catholic and married in a civil ceremony with no church approval at that time, and divorced, you can marry in the Catholic Church. Your new spouse has to meet guidelines, however; for example if he/she was married in the churchas Catholic and divorced he cannot marry you unless his first marriage was annulled.
You can only get married in a Catholic Church when the union is not contrary to the teachings of the Catholic Church.
No, civilly married couples who are not married in the Catholic Church are generally not allowed to receive communion in the Catholic Church.
A divorced man/ woman cannot get married in the catholic church again. The sacrament of matrimony can be received only once in the Roman Catholic Church.
Yes, everyone is welcome in the Catholic Church
In the Catholic Church, you cannot get married on Good Friday and Holy Saturday.
Yes
Yes, because in the eyes of the Lord, they are not married. They are allowed to get married in a church, but only once, if it is in a Catholic church. --> See Catholism
Yes. One is always welcome to come home to the Catholic church.
No, Roman Catholics are required to be married in a Catholic Church, by a Catholic priest.