You've never read the Bible, have you?
Leviticus 18:22 - "Do not lie with a man as one lies with a woman; that is detestable."
Leviticus 20:13 - "If a man lies with a man as one lies with a woman, both of them have done what is detestable. They must be put to death; their blood will be on their own heads."
Romans 1:26-27 - "Because of this, God gave them over to shameful lusts. Even their women exchanged natural relations for unnatural ones. In the same way the men also abandoned natural relations with women and were inflamed with lust for one another. Men committed indecent acts with other men, and received in themselves the due penalty for their perversion."
1 Corinthians 6:9-10 - "Do you not know that the wicked will not inherit the kingdom of God? Do not be deceived: Neither the sexually immoral nor idolaters nor adulterers nor male prostitutes nor homosexual offenders nor thieves nor the greedy nor drunkards nor slanderers nor swindlers will inherit the kingdom of God."
1 Timothy 1:8-10 - “But we know that the law is good if one uses it lawfully, knowing this: that the law is not made for a righteous person, but for the lawless and insubordinate, for the ungodly and for sinners, for the unholy and profane, for murderers of fathers and murderers of mothers, for manslayers, for fornicators, for sodomites, for kidnappers, for liars, for perjurers, and if there is any other thing that is contrary to sound doctrine…”
Jude 7 – “In a similar way, Sodom and Gomorrah and the surrounding towns gave themselves up to sexual immorality and perversion. They serve as an example of those who suffer the punishment of eternal fire.”
There's no gay marriages in the Old Testament; No gay marriages in the New Testament; no gay sex approved anywhere in the Bible. Just the opposite - gay sex is condemned in both testaments. God is consistent on that.
And to close:
“Whosoever shall be guilty of Rape, Polygamy, or Sodomy with man or woman shall be punished, if a man, by castration, if a woman, by cutting thro' the cartilage of her nose a hole of one half inch diameter at the least.” - Thomas Jefferson, A Bill for Proportioning Crimes and Punishments
Dr. Bruce Metzger of Princeton Theological Seminary mentions other references to Sodom's sexual immorality in 3 Maccabees 2:5: "the people of Sodom who acted arrogantly, who were notorious for their vices." And again in Jubilees 16:6: "the uncleanness of the Sodomites."