Answer by Zalatik for Bash: How to determine whether terminal is opened by third-party app

Here's my 2 cents. Just add it to your .bashrc. Replace terminals with your favorite terminals and export command with yours.

run_in_terminal(){
  local parent_command="$(ps --no-headers --pid $PPID -o command | awk '{print $1;}')"
  local parent="$(basename $parent_command)"
  local terminals=( gnome-terminal st xterm ) # list your favorite terminal here
  if [[ ${terminals[*]} =~ ${parent} ]]; then
    # Your commands to run if in terminal
    export MY_VAR_IN_TERMINAL="test"
  fi
}
run_in_terminal