Rush just mentioned this on his radio show. He said she was escorted out but no mention of an arrest.
As I recall from my senior high school trip to Wash. (many years ago) and my seat in the House Gallery, gallery sitters are required to be quiet. I expect the woman was simply ejected from the gallery.
What she did was an act of civil disobedence—no different than Blacks sitting at “white’s only” lunch counters and the front of the bus in the South years ago.
It is obvious that civil disobedient acts (sit-ins, freedom marches and the like) are effective ways to protest an unresponsive government. There is absolutely no reason for conservatives to remove that arrow from their quiver.