Use destacamos website and pick location Las Palmas and just look out for any ads that say maspalomas or playa de ingles and translate ads to English...
There was no information whatsoever to give (rules of the organisation) - like I said I would have been none the wiser had I not "Googled" the prison...
Meloneras/Maspalomas .. Thats's 'upper market holidays' Gran Canaria, especially Meloneras. Not sure what might be available there, possible outcall...