gcom: 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/gcom - from package: comgt

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

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