GMA and its principals have provided services to both domestic and international clients. Below is a partial list of gaming companies and entities that GMA serves.

• 177 Project LLC
• Kepinski & Associates
• Aces Wired
• Allegany Entertainment
• Analytical Environmental Services-AES
• Bay Harbour Management
• Boyd Gaming
• Cable Consulting
• CAMI Capital
• CBRE
• Chippewa Cree Tribe of the Rocky Boy Reservation
• Claremont Companies
• Coushatta Casino
• De Rito Hospitality
• Echelon Resorts
• Edge-Star Partners
• Enjoy
• Forsythe Racing
• Fortress Investment Group
• Full House Resorts
• Globalysis
• Gold Nugget Las Vegas
• International Game Technologies
• Isle of Capri Casinos
• Jacobs Entertainment
• Jena Band of Choctaw Indians
• Kansas Gaming, Inc.
• Kiowa Casino
• La Jolla Band of Luiseno Indians
• LINX
• Lloyds of London
• Macquarie Securities Inc.
• Mohegan Sun
• Meczka Marketing/Research
• MGM Mirage Resorts
• Mille Lacs Band of Obijwa
• Majestic Star
• Morongo Casino
• Nevada Gold
• Nooksack Tribe
• NORAM
• Olympia Group
• Ontario Lottery and Gaming Commission
• Paragon Gaming
• Planet Hollywood
• Ponca Tribe of NE/ Sovereign Gaming
• Reliant Development
• Santa Ana Star
• Sherwood Valley Rancheria Band of Pomo Indians
• Shoshone Tribe
• SMP
• Soboba Casino
• Southwest Casino & Hotel Corp.
• Spirit Mountain Casino
• Voyager
• WAICCS Las Vegas LLC
• Westbrook Partners
• Wilmorite
• Wichita and Affiliated Tribes