fso-gpsd: 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/sbin/fso-gpsd - from package: fso-gpsd

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

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