The gruid-sdl2 module provides a gruid Driver for using the SDL2 library to build native graphical applications.
The module's package is called sdl. For it to work, you need to install the SDL2 library on your system before.
Be sure to install the dev version of the package, for distributions that make
such a distinction. For example, in Debian-derived systems, a command like apt install libsdl2-dev may be used.