This street name is NW Gower Avenue, NOT North Gower Street. 

The houses on NW Gower Avenue are

4601 NW Gower Avenue
4605 NW Gower Avenue
4615 NW Gower Avenue
4701 NW Gower Avenue
4703 NW Gower Avenue

After 4703, the road name changes to NW Cerrito Lane which is properly marked. 
