Why would you go via Madrid, one of the biggest Airports in Europe? sure if you fancy walking 4 miles. worst case you take a flight to Malaga, or transfer internally, ie Casablanca.

GB Airways has been bought by Easyjet, so you can expect re-branding and cheaper flights After March 08 (up until this period they will be operated as GB) with hopefully all of the same routes.

Sources, I cant paste links, go to a search engine and type:

GB Airways Easy jet

and for ryanair type

Ryanair morocco new routes