GNAT has been around since the 90s, based on GCC. My university did some work on the compiler and used it for some undergrad courses like real-time programming.

GNAT has been around since the 90s, based on GCC. My university did some work on the compiler and used it for some undergrad courses like real-time programming. IIRC there was an attempt to use Ada for intro to programming courses, but I think they chose Pascal and then eventually C++.