One of the main arguments of those who promote the notion that Homosexuality is a gift from God and created homosexuals to have a same sex attraction" do so because they believe each person is born with one sexual orientation or an other and that it cannot be changed. In other words, "Biology is destiny."
First, biology is NOT destiny. In fact, physical/biological preferences are changed all the time. A Russian researcher named Pavlov did a series of studies with dogs way back in the early 1900's. One of the studies rang a bell when the dogs were ready to eat their food. After ringing the bell on several occasions, Pavlov rang the bell without providing the dogs their regular food but he dogs salivated anyway, proving that the biological processes of the dogs were altered, and it did not take much to cause the changes.
Second, God creates all persons in His image. We have the ability to make decisions, moral judgments and relate with God. However, because of sin every person is flawed, broken and fallible. The brokenness of humanity includes biology so our bodies and our sensual drives are also unholy and distorted. Sexual deviance is normal but it is also sinful so we dare not claim that our deviancy is from God or a gift of God.
Third, God defines what is right and wrong and we do not. The Bible says that God created male and female to marry and live together as one. God does not consider adultery, polygamy or homosexuality as gifts but as sins. My sinful sexual deviance is adultery. If I let myself I would have sex with women other than my wife. But, that is wrong and I have never been involved in adultery and I never will.
Biology is not destiny. Thank God change is possible and often.