u can search for gestalt therapists in your area or for online therapists licensed in your state. You may also want to look at directories, such as:
Inclusive Therapists (United States and international)
Gestalt Associates for Psychotherapy (New York)
Gestalt Therapy Institute of Los Angeles
The Gestalt Centre (United Kingdom)
Because a positive therapist-client relationship is important for gestalt therapy, you can also try asking a therapist you trust to incorporate gestalt techniques into your sessions.