gta2dot: 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/gta2dot - from package: mona

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

Error in other languages:
gta2dot: bevel nie gevind nie
gta2dot: comandă negăsită
gta2dot: comando não encontrado
gta2dot: commande introuvable
gta2dot: command not found
gta2dot: käsku ei ole
gta2dot: không tìm thấy lệnh
gta2dot: komanda nerasta
gta2dot: Kommando nicht gefunden.
gta2dot: kommandot finns inte
gta2dot: komut yok
gta2dot: nie znaleziono polecenia
gta2dot: níor aimsíodh an t-ordú
gta2dot: no se encontró la orden
gta2dot: no s'ha trobat l'ordre
gta2dot: opdracht niet gevonden
gta2dot: parancs nem található
gta2dot: perintah tidak ditemukan
gta2dot: príkaz nenájdený
gta2dot: příkaz nenalezen
gta2dot: команда не найдена
gta2dot: командата не е открита
gta2dot: 命令找不到
gta2dot: コマンドが見つかりません