Noooo. Es un rollo. Ademas habia que compilar antes otras herramientas. Para colmo no se podía empaquetar como deb fácilmente.

Habia un modo en:

http://agurney.com/raspberry-pi/pi-chart

Grib - zyGrib

There is a version of zyGrib available in the Raspbian repository (installed using the command apt-get install zygrib)
.. unfortunately, at time of writing this is obsolete and you will be prompted to upgrade (which isn't an option!)
So.... I've adapted the script that first appeared here.
login as the pi user and go the home directory (/home/pi)
cd ~
download the script
wget http://agurney.com/raspi/zygrib_install.sh
change the permissions to make the script executable
chmod +x zygrib_install.sh
sudo apt-get update

run the script
./zygrib_install.sh

... it will take around 90 minutes to complete if compiling on a Pi.

Pero creo que el plugin de gribs de opencpn si que lo abre aunque un poco raro. Pero lo abre.