gambc-cc: 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/lib64/gambit-c/bin/gambc-cc - from package: gambit-c

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

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