Simply read a gpg-encrypted file in less

gpg-less.sh

#!/bin/bash

# if $1 is set, source the corresponding file
if [ -n "$1" ]
then
  if [ -f "$1" ]
  then
    gpg --decrypt $1 2> /dev/null | less
  else
    echo "File does not exist."
  fi
else
  echo "No file given to source."
fi