There might be one in the future. There might have been some in the past but on most servers I never even open GS window so I can't say if some didn't have it. I recall maybe on two servers run by 'locals' I clicked the shop icon by mistake, closed the shop window and didn't buy anything.
One exception was Korean Happy server but there I was buying with game gold, that is, with the gold mobs drop, I think 'gg' actually means the real money purchase of special currency which you then spend on GS items, right? My flaky awareness of it tells you, I never pay any real life cash on any server.
Anyway, I only suggested that so some one man servers are not put off going online or the twilight servers with few pple playing might not have additional reason to shut down. However, since by what I read about here, hosting a server is not a cheap thing to do, so some charge you put on won't probably make a dent in it one way or another.