gvba: 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/gvba - from package: visualboyadvance-gtk

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

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