Can periodic (like female reproductive bleeding) rectal bleeding since early puberty be a symptom of intersex condition in an adult male?

Doubt it. Common things are usually common.Periodic rectal bleeding in adult males is usually due to a fissure in the anal skin or hemorrhoids.
Consult the ISNA. Experts and specialists of the Intersex Society of North America (the ISNA) may be able to answer your question . It would also be very wise and valuable to consult a gastroenterologist with expertise in colonoscopy to seek a diagnostic cause (and hopefully the treatment options) of the "periodic rectal bleeding".