gexample: 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/gexample - from package: pvm-examples

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

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