[Answered ]-How to filter points in range with geodjango

Got help from this question GeoDjango within a NE, SW box
and finally solved it like this

from django.contrib.gis.geos import Polygon

bbox = (-6.9145,53.5958,-5.6085,53.1023)#min_lat,max_lat,min_lng,max_lng 
geom = Polygon.from_bbox(bbox)

Location.objects.filter(point__within=geom)