"www.gibraltarairterminal.com". Bit of a clunky URL isn't it?
It doesn't appear to be an official website though.
"www.gibraltarairport.com" seems to be free.
"www.flygib.com" has a nice ring to it, although some pretend airline owns that one.
"www.flygibraltar.com" is for sale and could be yours for $1,395 apparently.
Got an opening date for the new terminal yet?