Transgender people are those who have a gender identity or gender expression that differs from their sex at birth. However, the prevailing cultural notion that gender is a societal construct where one chooses according to his/her own whims is contrary to the biblical understanding of gender.
In Genesis 1:27, God establishes binary sexual complementarity. This means that God's "good" design for humanity is two sexes. These two sexes exist so that they can come together in the one flesh union of marriage for the purpose of pro-creation. This procreative capacity implies the binary view of sex.