Was I born gay?
Was I born liking pizza? Was I born liking beer?
We're born needing food, drink and sex. How we like those things are acquired tastes, which is a dance between the brain and that which it encounters, not to mention how it encounters, when it encounters and why it encounters.
Was I born straight or gay? No. I was born hungry, thirsty and eventually, horny. The rest is details.