Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We hereby consent to the use in this Registration Statement on Form S-1 of our report dated March 29, 2024, relating to the consolidated financial statements of GCT Semiconductor, Inc., which appears in such Registration Statement. We also consent to the reference to us under the heading “Experts” in such Registration Statement.

/s/ BPM LLP

San Jose, California

May 21, 2024