GASIL became incorporated into the GASCo magazine 'Safety Matters' from late 2011/early 2012. Safety Matters is still published by GASCo but the GASIL centre pages stopped when the CAA pulled the funding. Unfortunately GASCo no longer provides its magazine to flying clubs and others for free. It is now, sadly in my opinion, only available from GASCo by a subscription of £16 per year. Needless to say the subscription numbers for it are declining.
You can register with GASCo to receive its online 'Flight Safety Extra' for free, via its website.