Great Computer Systems, Inc. specializes in computer service and repair, computer upgrades, website design, search engine optimization, custom application development, network installation (wired and wireless) & support, virus detection/removal, phone systems, voice over ip (VOIP), web based video monitoring systems and application service provider APS.

We are based in Milton, ON suburb of Toronto. We provide support to clients, both business and home users, in Toronto and Greater Toronto Area suburbs. GCS has diverse group of qualified professionals with varying skills in the technology industry. This allows us to make sure the most qualified tech is assigned to handle each project.

If you are a small business which needs technology support, but does not have the need or can not afford IT department, GCS is your Total IT solution provider. GCS can support your existing computer applications and technology infrastructure, make recommendations to improve efficiency and reduce cost, or just be your on-call IT department when problems occur.

We are serving our customers in Toronto and Greater Toronto Area suburbs which includes Mississauga, Oakville, Burlington, Hamilton, Brampton, Orangeville, Milton, Markham, Etobicoke, North York, East York, Woodbridge, Scarborough and beyond. We provide computer services, network installations, phone systems, VPN setup, Firewall setup, E-Mail Spam Control, Web Site design and hosting, and more. We provide 24/7 techincal support to our clients.