Daryl Dixon isn't gay in the comics. The storylines mainly revolve around his adventures and struggles in a post-apocalyptic world, not his sexual orientation.
Daryl Dixon in fanfics is frequently portrayed as a complex character. He has his own demons from his past, which often adds depth to his character. His relationship with other characters, like Rick or Carol, is also explored in different ways. Sometimes he's the protector, always on the lookout for danger, and other times he's the one in need of support and understanding. His evolution from a loner to a part of a community is also a significant aspect in many fan - written stories.