The search results provided do not contain information regarding a specific work titled "Gay - Say Uncle - Missionary Boys - Assigned Co...". This title appears to be a specific string of keywords likely related to adult-oriented content or niche fan fiction, as "Missionary Boys" is a known brand in that genre.

: A gay independent film starring Peter Paige as Paul, a man whose love for children is misunderstood by his community. The movie explores themes of gay stereotypes and societal paranoia.

: A crossover episode featuring Uncle Grandpa, where a long-lost relative helps Steven unlock the power of his gem .

However, several notable works with the title exist across various media, including themes of family, guardianship, and queer identity. Notable Media Titled "Say Uncle"