GSL Dardan (GSLD) is the UK's leading independent provider of private security services and security systems. The company was formed in January 2009 through the merger of established companies ISL Dardan Security and Gardwell Security, which have a trading history dating back to 1973.

GSM Secure Distribution Ltd was found in 2006. GSM Secure Distribution Ltd supplies GSM solutions and innovative products to companies and end users. Based in the UK seeking distributors and resellers of products worldwide. The company's products have been sold well in North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe.

The GSMA represents the interests of mobile operators worldwide. Spanning more than 220 countries, the GSMA unites nearly 800 of the world’s mobile operators with more than 230 companies in the broader mobile ecosystem, including handset makers, software companies, equipment providers and Internet companies, as well as organizations in industry sectors such as financial services, healthcare, media, transport and utilities.

GTMaritime specialize in providing solutions and services that help ensure vessel compliance and business operability 365 days a year, as well as keeping crew in touch with friends and family whilst at sea. All of this is backed up by a market-pioneering infrastructure and unrivaled 24-hour customer support, every day of the year.

From its inception in 1996, Guardian Staff Safety Systems is now recognized as one of the leading providers of Staff Safety and Protection Systems in the UK and European market place. It has become the preferred choice of several Government Departments and is widely used by NHS Trusts and private healthcare providers.

Guard it camguards manufacture security cages for CCTV cameras, PIR Detectors, lighting, etc. They also make and supply cages of any size and colour required.

Guardall Security Systems (UK) is a family-run security company established in 2001 that specialises in installing and maintaining intruder alarms, high-definition CCTV systems and access control solutions for residential and commercial clients, with SSAIB, police and insurance approvals.

Guardian Alarms Ltd. install and maintain security systems including wireless burglar alarms, CCTV, and access control systems etc. Based in Surrey, the company provides services to residential and commercial properties. Guardian Alarms Ltd. Guardian Alarms Ltd. is accredited by the National Security Inspectorate (NSI) and all the alarm systems are installed to NSI Gold standards and issued with a NACOSS Gold certificate.

Guardian Security & Fire. is accredited to the highest industry standard and specialize in the installation and maintenance of electronic security and fire systems. The company offers a wide range of solutions covering Fire Alarms, Intruder Alarms, Access control and a diverse range of CCTV solutions. Guardian Security & Fire confirms its status as a premium supplier and reflects the quality and reliability of our staff and processes.

Guardian Security & Fire Ltd has been installing alarm, access control and CCTV systems in Kent since 1987. NACOSS Approved.

Guardian Security SW Ltd provides professional security solutions across the South West and the UK from head office in Exeter, Devon. The company specializes in Salto access control, CCTV, architectural ironmongery, fire alarms, emergency lighting, safes and safe moving, fire extinguishers, gate & barrier automation, security roller shutters, keys, key cutting & master key suites & locks, locksmiths, emergency lighting, and ANPR.

Guardian24 is a UK-based organization which has specialized in delivering complete solutions and services to the ‘lone worker’ market since 2005, and they provide a number of services including training, assistance with policy and a unique personal security service which allows lone workers to log their whereabouts, daily tasks and raise an alert when in time of need, should their safety be compromised.

GUK manned guarding services are tailored to meet specific client needs. Businesses face generic threats and challenges, but no two businesses are exactly the same. The company's team of specialists, SIA-licensed officers go beyond securing people and property. Operating across the UK, it has built a strong capability in a range of sectors, backed by a senior management team with a proven industry track record.

Guardright supplies comprehensive, professional and accountable security services. The company provides an extensive range of high quality security guard services such as mobile patrols, keyholding and alarm response services, manned guarding, industrial security guards and event stewarding.

Guartel Technologies Ltd specializes in design and manufacture of high quality, metal, mine, wire detectors and electro optical search equipments. The products of Guartel Technologies is used in police forces, security services, NGOs, NATO and other military forces world-wide.

Guide Security Services is the integrated security and remote monitoring solution provider in the UK. GSS specializes in design, installation, maintenance and ongoing monitoring of security and video surveillance solutions across multiple industries and service sectors, including: retail, business sector, residential and remote monitoring etc.