Are here any whay to list up a spesial type of poi, like searching for gas station, or a list with all the catogories of the poi?
Not currently. Very few POI’s in the Waze database itself. Most of the time you will be getting results returned from Bing. No way to filter via a selection on category, distance, etc.
You could try searching on the category though. You should be able to search for ‘pizza’ and return anything that is categorized in Bing as Pizza or has Pizza in the POI name.
Consider the POI similar to searching directly at Bing in your browser. User the keywords in the search box to ‘filter’ for what you want.