GCT may refer to:
Medicine Germ cell tumor Giant-cell tumor of bone Glucose challenge test Granulosa cell tumor
Transport Gauge Change Train, a Japanese train Ghazipur City railway station, in Uttar Pradesh, India Grand Canyon Bar 10 Airport, in Arizona, United States Grand Central Terminal, in New York City Great Coates railway station in England Grimsby-Cleethorpes Transport, former municipal bus company of Grimsby and Cleethorpes, England Gwinnett County Transit, in Georgia, United States
Other uses Galapagos Conservation Trust, a British charity Geometric complexity theory General consumption tax German Colonial Tovar dialect of German, spoken in Venezuela Global Champions Tour, a show jumping series Gloucester County Times, a daily newspaper in New Jersey Government College of Technology (disambiguation) Grand Chess Tour, an annual circuit of chess tournaments Grande Cadence de Tir (GCT) 155mm, French self-propelled artillery vehicle Green Card Test, used by the United States Internal Revenue Service Green Crescent Trust, in Sindh, Pakistan Greene County Tech School District, in Greene County, Arkansas, United States Greenwich Civil Time, an obsolete term for what is now known as Greenwich Mean Time Greenwood Community Theatre, in South Carolina, United States Gunma Crane Thunders, a Japanese basketball team GCT, a codon for the amino acid Alanine