gnect: 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/gnect - from package: gnome-games-extra

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

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