Lately I've been poking through a bunch of releases on gonzomovies and the reality is a mixed bag — many releases do include English subtitles, but it's not guaranteed across the board. For popular or widely circulated titles you'll often see English softsubs (toggleable in the player) or hardsubs
Burned into the video, and sometimes there's a separate .srt file packaged with the release. If the uploader cares about international viewers they'll usually mention 'English subtitles' in the description, and you can often spot an 'EN' icon or a subtitle toggle in the embedded player.
That said, quality and availability vary. Some uploads rely on community-made translations that range from excellent to rough machine-assisted translations. Other releases are raw rips without any subs at all, especially obscure or very new stuff. If subtitles aren't present in the player, I check the file list for a .srt/.ass file, or scan the comments where other viewers often note subtitle accuracy or missing
tracks. Also worth noting: a number of legitimate Gonzo-produced shows like 'Last Exile' or 'Gantz' have official releases
Elsewhere with much cleaner subtitle tracks, so if accuracy matters I tend to cross-reference.
In practice I treat gonzomovies like a convenience resource: great when they include solid English subtitles, passable when community subs are available, and frustrating when nothing is included. Personally I keep a player like VLC on hand so I can drop in an external .srt if needed, and I try to support official releases for the best subtitle quality and reliability.