
Welcome to GSO Services
Use Coupon Code THX10 For A 10% Discount On Self-paced Courses
Courses 2025:
Instructor-Led
Sex Crimes 2/21 - 2/22 (7 cr)
Ethics in Expert Witness Testimony. Language Neutral, 2 dates: 3/5 and - 3/7 (3 cr)
Firearms & Ballistics II: Ghost Guns, Conversion Devices & Explosives. 3/21 - 3/22 (5 cr)
The Trial of Chapo Guzman. TBD (7cr)
Mental Health, Competency and Insanity TBD (6 cr)
Firearms & Ballistics (8 cr) TBD
DUIs & Field Sobriety Tests (6 cr) TBD
DNA (4 cr) TBD
Domestic Violence (5 cr) TBD
La Mara (MS13) Double Murder (6 cr) TBD
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Self-Paced (Expert Witness Series)
Domestic Violence (5 cr)
Firearms & Ballistics (8 cr)
Sex Crimes (7 cr)
DUIs & Field Sobriety (6 cr)
Medical Examiner & Autopsies (7 cr)
DNA (4 cr)
Coming soon:
Firearms & Ballistics II: Ghost Guns, Conversion Devices & Explosives 5 cr)
Ethics in Expert Witness Testimony. Language Neutral (3 cr)
Mental Health, Competency and Insanity (6 cr)
Other Self-Paced Courses
The Trial of El Chapo Guzman (7 cr)
FREE. Witness to a Trial (3 cr)
Court Interpretation (40 hrs)
True Crime Podcasts (2 cr)
Coming soon:
MS13 Double Murder Trial (6 cr)
Ethics in Expert Witness Testimony. Language Neutral (3 cr)
When interpreters rise, access to justice rises with them.
Products & Services
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Firearms & Ballistics, Sex Crimes, DUIs, Medical Examiner & Autopsies, are some of the titles in this Expert Witness Series for court and medical interpreters.
FOR INTERESTED INSTRUCTORS, GSO Services can provide course materials and presentations. Please call us directly.

Genevieve “Gigi” Sefchick is a Nevada Court-Certified Interpreter and a Certified Healthcare Interpreter (CCHI). She recently retired from the Washoe County District Attorney’s Office, where she served as a Victim Advocate for nearly two decades, beginning in 2004. She served as Chairperson of the Alliance for Victims’ Rights from 2016 to 2020.
Gigi has trained court interpreters since 2005, beginning at Truckee Meadows Community College, where she prepared aspiring interpreters for state certification. Over time, she developed specialized training materials and workshops focused on the terminology used in expert witness testimony, including firearms and ballistics, sex crimes, fingerprints, DNA, serology, and other forensic disciplines. She has also taught advanced courses in simultaneous interpretation, note-taking, and medical interpretation, supporting certified interpreters in earning Continuing Education Units (CEUs) required for license maintenance.
In addition to TMCC, Gigi has served as an instructor at the University of Nevada, Reno’s International Center and the Northern Nevada Literacy Council. She is currently a member of the National Association of Judiciary Interpreters and Translators (NAJIT).
Gigi now teaches nationally through online courses hosted on the Teachable platform. Recognizing the lack of advanced, terminology-driven training for court interpreters, her mission is to provide rigorous, practical learning opportunities that strengthen interpreter performance and promote meaningful access to justice for all court participants.
























