The GTF XFree86 modeline generator is a utility for calculating VESA GTF modes.
Created attachment 93532 [details] x11-apps/gtf/gtf-0.1.ebuild Ebuild for GTF.
donnie@supernova ~ $ qlist xorg-server | grep gtf /usr/share/man/man1/gtf.1x.gz /usr/lib/debug/usr/bin/gtf.debug /usr/bin/gtf xorg-server already provides this, try modular X if you aren't.