gm-print_doc: 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 Debian possible default full paths are:

/usr/bin/gm-print_doc - from package: gnumed-client

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

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