Born in Fresno, California, Dr. Gilio grew up in an agricultural setting while living in Sanger, California. He attended Sanger High School and Fresno State College. He received his D.D.S. Degree from the University of California, San Francisco, School of Dentistry and his Certification in Periodontics from the University of Southern California (USC). Dr. Gilio has been in private practice since 1975.

Dr. Gilio received his Laser Certification from the Academy of Laser Dentistry. He has achieved 'Master Status' and is the only periodontist in the world to be issued a 'Certificate of Category E'. He is now an examiner with The Academy of Laser Dentistry. He conducts the testing of all levels for dentists who wish to receive their certification.

Dr. Gilio is an instructor in periodontal procedures for general residency doctors at the Veterans Administration Hospital in Fresno, California. He is formerly an instructor at the University of Southern California, School of Dentistry in Periodontics. He has conducted training courses world wide on the use of Periodontal Laser techniques.

Dr. Gilio has published numerous papers on periodontal therapy and Periodontal Laser techniques. Most recently for the American Society of Laser Medicine & Surgery in regards to dentistry Dr. Gilio published a paper on 'Stimulating the patients gum tissue to increase naturally without tissue grafting'.