GNvim is described as ', Neovim GUI aiming for rich code editing experience without any unnecessary web bloat'. There are more than 10 alternatives to GNvim for Mac, Windows, Linux, Self-Hosted solutions and PortableApps.com. The best alternative is Onivim 2. It's not free, so if you're looking for a free alternative, you could try MacVim or Neovide. Other great apps like GNvim are Aubrey's gVim (Free, Open Source), VimR (Free, Open Source), DinVim (Paid) and NyaoVim (Free).
MacVim is a port of the text editor Vim to Mac OS X. MacVim supports multiple windows with tabbed editing and a host of other features such as: * bindings to standard OS X keyboard shortcuts (?Z, ?V, ?A, ?G, etc.
Neovide is a simple graphical user interface for Neovim (an aggressively refactored and updated Vim editor). Where possible there are some graphical improvements, but functionally it should act like the terminal UI.
VimR is a Neovim GUI for macOS with the goal of building an editor that uses Neovim inside with many of the convenience GUI features similar to those present in modern editors. VimR mainly uses Swift, but also C/Objective-C when/where appropriate.
DinVim is a version of the Vim text editor, a lightweight text editor for programmers and computer geeks. This app is made specially for the Mac OS X app store. This Vim for Mac is based on Neo Vim, which is a modernized Vim engine.
FVim is a cross-platform Neovim front-end UI, built with F# (programming language) and Avalonia. FVim features HiDPI support, high-performance, GPU accelerated rendering, remoting and even window detaching.
NVUI is a modern front-end for Neovim complete with animated windows and cursor, smooth scrolling, configurable positions, sizes and colors and more. NVUI is cross-platform, using Qt and DirectWrite on Windows.