Version 1.0.1 of package Gnat-Compiler has just been released in GNU ELPA. You can now find it in M-x list-packages RET.
Gnat-Compiler describes itself as: ============================== Support for running GNAT tools ============================== More at https://elpa.gnu.org/packages/gnat-compiler.html ## Summary: No description available. ## Recent NEWS: GNU Emacs gnat compiler NEWS -- history of user-visible changes. Copyright (C) 2022 Free Software Foundation, Inc. Please send gnat-compiler bug reports to bug-gnu-em...@gnu.org, with 'gnat-compiler' in the subject. If possible, use M-x report-emacs-bug. * gnat compiler 1.0.1 ** Rename create-alire-project to create-alire-prj. ** Fix bugs. * gnat compiler 1.0.0 ** Split out from ada-mode.