Please, before you assume this is some kind of shitpost, I'm serious. I've read some fringe articles on it since I'm obsessed with Vincent, but I was wondering if there's any true evidence towards this theory? I read about how infatuated he was with Gauguin and all that and I was just curious so I did a google. But I haven't seen any definitive evidence. I was curious if anyone had. Thanks!
Historians have explored the love lives of both Gauguin and Van Gogh in depth. "Paul Gauguin: An Erotic Life," by Nancy Mowll Mathews (2001), drops some bombshells about Gauguin's wife-beating, so I doubt she would have a problem discussing a same-sex liaison, but there's not a whisper. I've read two good treatments of Van Gogh's romantic relationships: "Van Gogh in Love" (Bos and Heenk, 2014) and "Van Gogh's Women" (Derek Fell, 2005). Both of these describe his troubled and obsessive love affairs with women, but they mention nothing about men.
Van Gogh and Gauguin's friendship was stormy, but it seems fairly evident there were no sexual overtones. The fringe articles you mention sound like they make the presentist assumption that all intimate male friendships in the 19th century had an overtly sexual component.