gifspnge: 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/gifspnge - from package: giflib-utils

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

On Debian possible default full paths are:

/usr/bin/gifspnge - from package: giflib-tools

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

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