gmrun: 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/gmrun - from package: gmrun

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

On Debian possible default full paths are:

/usr/bin/gmrun - from package: gmrun

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

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