Omniplex may refer to:

• Omniplex Cinemas, a cinema group in Ireland
• The Omniplex Science Museum, a previous name of the Science Museum Oklahoma in Oklahoma City
• The Omniplex, a proposed but never built sports complex in Edmonton, Alberta, that would have had a football stadium suspended over an ice hockey rink 

• GRG Banking
• Grgelj
• GrGen
• Grgeteg (village)
• GR: Giant Robo
• Grgich Hills
• Grgich Hills Cellar
• Grgich wine
• Grgici
• Grgić
• Grgići
• GRG Matriculation Higher Secondary School
• G. R. G. Mure
• Grgo Martic
• G R Gopinath
• G.R. Gopinath
• GR Gopinath
• Gr/gr
• Gr/gr deletion
• G. R. Grimmett
• Grgurici
• Grgur III Šubić Bribirski
• Grgurići
• Grgur Kamonas
• Grgur Ninski