gl-compile-conf: 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/gl-compile-conf - from package: gitolite

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

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