@Eddi
If you agree that the Bible is the word of God, then the answer HAS to be yes. Sodomy is called an abomination.
Sex is powerful, and can at times be destructive when people have no clear idea who can sleep with whom, or when children are born into a world where they are not sheltered by a committed mother and father. Therefore sex is protected by marriage, which is a man and woman committed to each other with the intent to create a family with children, or something very close to that ideal. For example, a couple too old to have more children, or a barren couple are close enough to the idea. A gay relationship, no matter how loving, is not because gay sex does not produce children.
Given that sex is moral only within marriage, anyone who is not married should refrain from sex (or refrain from extramarital affairs). This includes fornication, and cohabiting. The rule if you are not married is celebacy. So its not just gays, but it certainly includes gays.