Final answer:
The law enforcement strategy focusing on known gang members and hideouts to suppress criminal activity is known as hotspot targeting, aided by geographic analysis tools like GIS.
Step-by-step explanation:
The suppression strategy where law enforcement focuses their energies on known gang members and known gang hideouts is referred to as hotspot targeting. This form of policing involves identifying and concentrating on areas where crime is most concentrated. Law enforcement uses GIS (Geographic Information Systems) and hotspot analysis to visualize crime patterns and assist in deploying resources to areas with a high frequency of criminal activity.