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Small Business Specialist
> Professional IT Sales and Support
> More than 15 Years of Experience

Fast and Professional

As an IT specialist we realise how important it is that your equipment is running at its best and repairs are done quickly
If you have a breakdown it can cost you time, money and, sometimes,  customers.
We are available 7 days a week (Sundays emergency service only).
Don’t accept anything less than the best.

computer maintenance laptop fan

Repair Services

We can repair your computer, laptop or Ipad.
Cheaper to repair than replace.

Contact Us


Based in Castlerock, Co. Londonderry we can visit your home or place of business. No call out fee within 20 miles, we only charge for time spent onsite.


About Us

Established in 2003 Gary has been building and repairing computers for businesses and home users for 15 years.

5 Great Reasons
To Choose GM-TECH


We have a track record of business IT services


No job is too big or too small, we can help.


We only use branded, guaranteed components in our repairs and system builds.

Fast service

We appreciate how a device breakdown can affect you, especially businesses, We aim to get out within one working day to most customers.

All Work Guaranteed

All our repairs carry a 12 month parts warranty.

Other services

Microsoft refurbisher

We are a Microsoft Registered Refurbisher All our refurbished P.C.'s either have the original licences or have been correctly licenced with genuine software from Microsoft.

Apple Repair

We can repair your Apple devices. Mac, Imac, Macbook and Ipad


Regular checks can minimise the change of system and data failure plus reduce downtime. We also do a remote management and monitoring service that will check the vital functioning of your machine in real time highlighting issues before they become a problem.


Moving Office or premises? We can assist you moving your IT gear and set up your new Office.



After my existing computer's motherboard died, Gary built me a new PC with even better specs than the old one and he had it ready to collect within 2 days. Excellent job at a reasonable cost with friendly and personal service. Thanks, Gary. I'm now a new loyal customer.

Mike Wayne
17 June 2017

Bought a super little Fujitsu laptop from Gary last week. I'm delighted with it. It came with Windows 10 and now I've downloaded Office 16 it's perfect. Thanks!

Val Marshall
1st May 2018

Great service. Thought my laptop had died. Gary resurrected it! Very reasonable & knowledgeable. Would recommend to anyone. Thanks!

Lynn Farr
24th April 2018
GM-TECH is the trading name of GAGE Computers Ltd registered in England number 7947094 Registered Office: 9 Riverside, Bolton, BL1 8TU
GDPR small business specialist

GDPR Compliance

As part of our GDPR obligations we will only record personal data necessary for completion of repairs. We will not use your contact details to send unsolicited mail or email and we will never sell or otherwise give your contact information to third parties. We do not store passwords or other personal data except where it is necessary to perfom our services.