I think this might come up if I do a proper search, but I really don't have the time at the moment, sorry. Also, I think it's a quick question to answer for USonians: What does GOP stand for?

Grand Old Party

Oh my! You don't say! You know, somebody actually told me this and I thought they were pulling my leg! !! I thought it must stand for something more "official", since I saw it in newspapers all the time... This will teach me, definitely.

Thanks a lot, etaoin.

So, now the second question (sorry!), is GOP applied only to the Republican Party, or can they all be referred to as "Grand Old Party"?

just Republicans.

(wikipedia alert)

Right, I can take Wiki with a grain of salt. Thanks a lot.

oh, I wuz gonna guess Gangrenous Old Pharts ~ close then