gredit: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/gredit - from package: routeplanner-gnome

You may install the required package with command apt-get install {package}

Error in other languages:
gredit: bevel nie gevind nie
gredit: comandă negăsită
gredit: comando não encontrado
gredit: commande introuvable
gredit: command not found
gredit: käsku ei ole
gredit: không tìm thấy lệnh
gredit: komanda nerasta
gredit: Kommando nicht gefunden.
gredit: kommandot finns inte
gredit: komut yok
gredit: nie znaleziono polecenia
gredit: níor aimsíodh an t-ordú
gredit: no se encontró la orden
gredit: no s'ha trobat l'ordre
gredit: opdracht niet gevonden
gredit: parancs nem található
gredit: perintah tidak ditemukan
gredit: príkaz nenájdený
gredit: příkaz nenalezen
gredit: команда не найдена
gredit: командата не е открита
gredit: 命令找不到
gredit: コマンドが見つかりません