Living Out, which applied to join the register of charities in May, was granted charitable status after asking the commission to carry out an internal review and agreeing to alter some of its proposed charitable objects.
On its website, the group describes itself as one that helps Christians "who experience same-sex attraction stay faithful to Biblical teaching on sexual ethics and flourish at the same time", and helps the church to understand what it can do to support them.
The website says the group believes God loves all people regardless of their sexuality, but the Bible explicitly prohibits homosexual relationships, marriage and sex, saying that any such activity is "inconsistent with faithful church membership".
In a statement, the commission said: "On the basis of further evidence, submissions and revised objects adopted by Living Out, the commission was satisfied that the purpose of Living Out was for the public benefit.
"The commission concluded that Living Out is concerned with promoting the wider Christian principles of unconditional love, compassion, acceptance and understanding, and a welcoming place in the Christian Church for same-sex-attracted individuals who wish to stay true to their Christian faith."
No one from Living Out was available to comment.