Perfumes are always an appreciate gift here in Qatar, select from well-known brands and preferably new edition/perfume.
But here the occasion is a little special, so I would recommend you to bring also something less ordinary: nice silk scarfs, silver cuff-link, and try to see if you can bring anything special from the place you are coming from (any art craft? book with pictures of the region you are living? ....)
Avoid sweets if you are not sure that the ingredients are suitable for Muslims.