gource: 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/gource - from package: gource

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

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