Company: GCTS
Filing Date: 2025-05-30
Form Type: S-3/A
Source: 0001104659-25-054969
Chunk: 56

Company: GCT Semiconductor Holding, Inc.
Filing Date: 2025-05-30
Form: S-3/A
Chunk 56
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SIGNATURES</div>

Pursuant to the requirements
of the Securities Act of 1933, as amended, GCT Semiconductor Holding, Inc. certifies that it has reasonable grounds to believe that
it meets all of the requirements for filing on Form S-3 and has duly caused this registration statement to be signed on its behalf
by the undersigned, thereunto duly authorized, in San Jose, California, on May 30, 2025.

| GCT SEMICONDUCTOR HOLDING, INC. |                    |                         |
| By:                             | /s/ John Schlaefer |                         |
|                                 | Name:              | John Schlaefer          |
|                                 | Title:             | Chief Executive Officer |

<div align='center'>POWER OF ATTORNEY</div>

KNOW ALL PERSONS BY THESE PRESENTS,
that each person whose signature appears below constitutes and appoints John Schlaefer and Edmond Cheng, and each one of them, as his
or her true and lawful attorneys-in-fact and agents, with full power to act alone, with full powers of substitution and resubstitution,
for him or her and in his or her name, place and stead, in any and all capacities, to sign any and all amendments (including post-effective
amendments) to this registration statement on Form S-3, and to sign any registration statement for the same offering covered by this
registration statement that is to be effective on filing pursuant to Rule 462(b) under the Securities Act of 1933, as amended,
and all post-effective amendments thereto, and to file the same, with all exhibits thereto and other documents in connection therewith,
with the SEC, granting unto said attorneys-in-fact and agents, and each one of them, full power and authority to do and perform each and
every act and thing requisite and necessary to be done in connection therewith, as fully for all intents and purposes as he or she might
or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or any of them, or her substitute or
resubstitute, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of
the Securities Act of 1933, this registration statement has been signed by the following persons in the capacities and on the dates indicated.

| Signature      
 *              |     | Title                                        
 Chairman of                                  
 the Board                                    |