probably not, the way vim works if there are no more signs attached to a document the gutter goes away. This isn't plugin related, it's just a manner of how vim works.
Although I suppose you can work around this by displaying a fake sign (color match gutter background?), but that has its downsides (depending on colorscheme, the sign can show up. and vim doesn't support whitespace characters for signs, at least not from what I can see).
Although I suppose you can work around this by displaying a fake sign (color match gutter background?), but that has its downsides (depending on colorscheme, the sign can show up. and vim doesn't support whitespace characters for signs, at least not from what I can see).