gnome-text-editor: 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 CentOS possible default full paths are:

/usr/bin/gnome-text-editor - from package: gedit

You may install the required package with command yum install {package}

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