Do you still score a Go if you end with a pair or sequence?
You get one point because he called "Go", not because you played the last card(s).

http://www.bicyclecards.com/card-games/rule/cribbage:


  If a player cannot add another card without exceeding 31, he or she
  says "Go" and the opponent pegs 1. After gaining the Go, the opponent
  must first lay down any additional cards he can without exceeding 31.
  Besides the point for Go, he may then score any additional points that
  can be made through pairs and runs (described later). If a player
  reaches exactly 31, he pegs two instead of one for Go.