Because Switzerland is such a reserved, neutral nation and the Swiss will not typically invite foreign visitors to their home, gift giving is not common practice.
If you are given a gift, you should reciprocate with a gift of your own.
A proper time to exchange gifts is in celebration of the closing of negotiations.
Do not give: sharp objects, expensive gifts (these are seen as too personal or inappropriate), red flowers, white flowers. All of these items have connotations which are better avoided.