Even for Matsumoto, Gun Frontier is amazing. And by “amazing,” I mean “man-focused.” While the opening narration in Harlock or Railways tends toward talk of destiny, Gun Frontier focuses almost solely on manliness. Man wars, manly tears (I swear the phrase was actually used), the treachery of a woman, all that good shit. The source material is pretty old, even for the Matz (1972), and it shows its age in a sometimes-gross display of misogyny and homophobia.
However, it’s more of a screwball comedy than Matsumoto’s typical epic style, and is kinda fun.

clearly the audio here says HOMO
If you need an antidote to moe, crying schoolgirls, and magical pregnancies, take a page from Harlock’s Book of Sexual Satisfaction:

I find myself thinking about not touching Tochiro's balls
Gun Frontier can be viewed dubbed or subbed via Gong Anime on YouTube and Joost, even if their translations aren’t always the bee’s knees.

Then get ourselves a prostitutes
I’m halfway thru millennial queen and i have gun frontier on dvd somewhere. guess i’ll be watching this next!
I’m curious to see what you think, since you seem to have a more complete picture of the “Leijiverse” (your word?I love it, maybe even more than Matsuverse) than I do.