GCC is the GNU Compiler Collection. Some of the compilers it supports are:
C (invoke with gcc)
C++ (invoke with g++)
Fortran (invoke with gfortran)
Go, or golang, Google's custom programming language (invoke with go)
The below can be used to view all of the installations of GCC on a particular system, where this example uses Coeus.
$ module avail |& grep "^gcc"
gcc-6.3.0
gcc-7.2.0
gcc-7.5.0
gcc-8.2.0
gcc-9.2.0