Dr Robert (Bob) Gilbert, a highly accomplished dentist/periodontist and a passionate steward of the natural world, passed away peacefully on April 25, 2026, at the age of 89 after a long battle with Parkinson’s.

Robert came from a dental family in Dayton, Ohio. His father and brother, Barry, were dentists also. They all attended Denison University and the Ohio State University College of Dentistry. After Dental graduation Robert moved south where he spent two years as an Air Force dentist in Savannah, Ga. That was followed by specialty training in periodontics at the University of Alabama. While there he also joined one of the marches led by Dr. Martin Luther King Jr. in Selma, Al., in 1965. Throughout his career Robert was active in organized dentistry holding various leadership roles including that of Editor of the Journal of the Georgia Dental Association. Countless dental patients appreciated his exceptional combination of clinical excellence with engaging personal kindness.

A true Renaissance man, Robert lived a life defined by curiosity, creativity and a deep appreciation for beauty in all its forms. Beyond his distinguished career in dentistry, he was an avid lover of art and music, an enthusiastic traveler who explored more than 40 countries with his many friends and a dedicated naturalist. He was especially known for his expertise in birdwatching and his talent as a bonsai teacher, generously sharing his knowledge with many others.

In 1970, Robert and his longtime partner, Richard Smith, purchased and began restoring the historic Hiram Butler House, originally built in 1880. The two of them transformed the surrounding 11 acres into a remarkable landscape of specimen plants and cascading waterfalls. This extraordinary property later became the renowned Smith Gilbert Gardens in Kennesaw, Georgia, a lasting testament to their shared vision and devotion.

Following Richard Smith’s passing, Robert relocated to Franklin NC where he and his partner, Ray Knight, built a beautiful home on 35 forested acres and continued their lifelong passions for travel and for cultivating plants and peaceful spaces. A trout stream, gardens and greenhouse kept them busy for many years. As Robert’s health began to fail, Ray’s skill as the consummate companion and, ultimately, caregiver eased Robert’s difficult final years.

Robert is survived by his longtime partner, Ray Knight; nephews Dr Eric Gilbert and Steven Gilbert; his goddaughter, Cindy Giornolli; and Ray Knight’s nephew Clay and wife Julie Knight and their son, Leon.

Details of a Memorial Service are pending.

In lieu of flowers, donations may be made to Smith-Gilbert Gardens, ensuring that Robert’s legacy of beauty, education and stewardship continues to inspire future generations.