gpic: 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/gpic - from package: groff

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

On Debian possible default full paths are:

/usr/bin/gpic - from package: groff-base

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

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