Retrofit: Sending multidimensional array / or nested hash in GET request

I want to make a GET request for a path /realties

with some filtering options added to this request. The parameters might look like this:

?filter[num_rooms]=2&filter[region_coordinates][0]=[50,65]&filter[region_coordinates][1]=[51,62]

      

        
        
        
      

    

I cannot find a way to send such nested parameters with a Retrofit @GET request. I found that I can only send a map of strings:@QueryMap Map<String,String>