Gilbert Hickox's interest in psychology, sculpture and summer jobs as a framing carpenter led Gil to create architecture.  In 1980, with a Bachelor of Architecture degree from the University of Texas at Austin Architecture School,  ​Hickox was drawn to​ to work with the best architects ​in the center of the architecture world, New York 

​With hotel specialists, William B. Tabler Architects in New York, Hickox quickly gained  large, complex project experience on projects like the Registry (now InterContinental) Hotel in Addison, Texas, as the job captain and field representative overseeing the construction. Working on hotels around the world at Tabler, Gil honed supervising, mentoring, technical, and design skills to become an associate.  In 1990 the lure of family brought Hickox back to Dallas to do contract architectural work with Graham Greene, Richard Drummond Davis, Three Architecture and ArchiTexas.

In 1991 as Gilbert Hickox, Architect he designed residential, office and hospitality projects. His contextual Galleries Guesthouse for the 1873 Corners Bed & Breakfast Inn in Vicksburg, Mississippi received a compatibility award from the Vicksburg Historical Society.​

In 1999 Hickox joined Booziotis & Co. Architects as design and project architect to design with Bill Booziotis, the Communities Foundation of Texas Office Headquarters. The landmark building is noted for its distinctive massing of split curved copper-roofed office and conference wings surrounding a central courtyard and is considered one of their best works. 

In 2003 Gil sharpened technical skills at WDG Architecture as project architect on multi-family projects like the high-rise Rainey Street Apartments on Austin’s Lady Bird Lake.  As WDG project architect, he supervised the complex, mixed-use, two building project in Victory Park, the Terraces Condos and Vista Apartments, each with ground floor upscale retail.  At RTKL, as an associate and design / project architect, Hickox led the design of the Silver Point Lucaya Condos yachting community on Grand Bahama Island. Hickox was a RTKL project architect on the iconic folded-shape 40-storey high-rise with cascading roofs Grand Hyatt Hotel, in Shenzhen, China,.​

In 2008, as senior associate, design / project architect at Quimby McCoy Preservation Architecture, Gil Hickox and Nancy McCoy designed the YMCA Building Renovation Addition at Texas A&M University to LEED Silver standards in Revit software from concept through construction administration. The YMCA’s modern, metal clad hyphenated connection contrasts with the existing wing, while the contextual brick block addition blends with the original 1914 neo-classical building while distinguishing itself with simpler details.​

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Today, Gilbert Hickox Architect continues to  balance aesthetics, practicality and economics while collaborating with repeat clients.  Hickox produces unique, thoughtful and well-designed residential, multifamily, office and hospitality projects with humanistic attention to detail. ​Gil is a well-rounded architect with character and integrity who has tasteful and creative ideas to attain the client's goals.

Texas Registered Architect no. 14842