Programaticly, I need to include a google Maps map to automaticly generated pdf files. For this, I need to convert the map into some image format (jpg, png etc). How can it
You can use the Google Maps Static API to return an image of the map. It's a very easy, REST-like API that doesn't even require a key. Example:
http://maps.google.com/maps/api/staticmap?center=51.477222,0&zoom=14&size=400x400&sensor=false