This is dead for ages, it relies on vte:0 and there are multiple alternatives like moserial, cutecom or minicom
Please don't remove gtkterm just yet. The alternatives you list are NOT viable. Moserial and Cutecom do not support interactive shell, which I use regularly to access networking gear at $DAYJOB (I'm shocked that they don't, it should be a no-brainer). To be clear, by interactive I mean sending characters immediately, not waiting for lines, and without local echo. This is essential to be able to ask for help/completion in prompts (pressing ? or tab), etc. The bottom box with sent lines in both program's GUI is ridiculous. The server is the one to decide whether to echo the characters, which is used to hide passwords in login prompts. Minicom (and screen) does work, of course, it's a workhorse. But it's not graphical and IMHO it's awful to configure, I won't touch it for as long as my quickpkg'd gtkterm+vte works. So please reconsider removing gtkterm just because it's "dead for ages". It works fine and apparently has unique features among graphical terminals. I agree that depending on vte:0 sucks but it's exactly vte that makes it a real serial terminal. Btw, my stable gentoo box has a couple of other programs still depending on it: qemu (vte) and mate-terminal (!gtk3).
Extended removal for another month. However, we will not keep it when it becomes the last blocker for old vte removal. So unless you're willing to step up and port it to newer VTE, I don't see it staying.
Another vote for keeping it, for the same reasons as Tiago, plus moserial is the most ugly piece of... well, it's GTK3 so of course it is, but here is not the place for that rant. If only I had time to step up and take on the maintenance...
In https://github.com/phako/gtkterm there is an updated fork of the program. I have not tried it but according to the page this need GTK+ 3 and VTE 2.91 to compile.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=a474d68ae2db8b0500b08e8d54bc13dd1fc4ba73 commit a474d68ae2db8b0500b08e8d54bc13dd1fc4ba73 Author: Michał Górny <mgorny@gentoo.org> AuthorDate: 2017-10-03 21:45:42 +0000 Commit: Michał Górny <mgorny@gentoo.org> CommitDate: 2017-10-03 22:12:20 +0000 net-dialup/gtkterm: Remove last-rited pkg Closes: https://bugs.gentoo.org/622010 net-dialup/gtkterm/Manifest | 1 - .../files/gtkterm-0.99.7_rc1-configure.patch | 14 ----- net-dialup/gtkterm/gtkterm-0.99.7_rc1.ebuild | 70 ---------------------- net-dialup/gtkterm/metadata.xml | 6 -- profiles/package.mask | 5 -- 5 files changed, 96 deletions(-)