Then it is quite far fetched. Being a bit effeminate does not mean he is gay. Also hanging out with uncles is perfectly normal for a kid whose father does not have enough time to spare for his kids. And also remember that he was serious about his music career. He might not have had time for girls, in addition to the problem some girls may have about him being the son of a gangster. My opinion is that Puzo and FFC would have indicated it if they wanted their character to be a homosexual. If it is a "what if" scenario, still my answer remains that Anthony was not a gay, based on the arguments I provided above.