Throughout the scriptures there are consistent messages, as well as our own conscience - provided that it has not been seared beyond experiencing the guilt and shame when we sin.
The earliest mention of same gender sexual activity reveals it as being contrary to God's design.
Gen 13:13 But the men of Sodom were wicked and sinners before the Lord exceedingly.
Gen 19:4-8 But before they lay down (the angels), the men of the city, even the men of Sodom, compassed the house round, both old and young, all the people from every quarter:
And they called unto Lot, and said unto him, Where are the men which came in to thee this night? bring them out unto us, that we may know (have sex with) them.
The same message continues throughout scripture.
Rom 1:27 And likewise also the men, leaving the natural use of the woman, burned in their lust one toward another; men with men working that which is unseemly, and receiving in themselves that recompence of their error which was meet,
In addition to the 'logos', our conscience and the natural design of our genitalia there is also the conviction of the Holy Spirit which convinces us of sin.
God is a holy God!