Anything about it? I think that I´ve seen it already,but I could find here in BOX anything about it.

V-ip is usually followed by another verb.

gel-ip gitti = he came and left

inserting "sonra" doesn´t add too much to the meaning:

gel-ip sonra gitti = he came and after that he left.

Sounds unnecessary to me.

Çok sağolun,si++!