Debian Linux install GNU gcc compiler and development environment

You need to install package called Build-Essential Package.

This package contains an informational list of packages which are considered
Essential for building Debian packages including GCC compiler, make and other
Required tools. This package also depends on the packages on that list, to make
It easy to have the build-essential packages installed.

Simply type the following command as root user:
# Apt-Get update
& Apt-Get upgrade
# Apt-Get install build-essential
# Gcc-V
#
Make-V
Now, you shocould able to compile software, create Debian
Packages or simply write a code using C/C ++ compilers.