0001851961 2026-06-18 2026-06-18 0001851961 us-gaap:CommonStockMember 2026-06-18 2026-06-18 false 0001851961 SUITE 201 false 8-K/A 2026-06-18 GCT Semiconductor Holding, Inc. 001-41013 DE 86-2171699 2290 North 1st Street, Suite 201 San Jose CA 95131 408 434-6040 false false false false Common Stock, par value $0.0001 per share GCTS NYSE Warrants, each whole warrant exercisable for one share of Common Stock for $11.50 per share GCTS.WS NYSE true