G.S.I. Complete Glass Inc.


About us

We are a family owned business and have had our doors open for over 25 years. We have over 100 years of experience. Our name tells the story about who we are at GSI. Guarantee, Service, & Integrity. Integrity means doing the right thing when no one is watching. We have great people with great product knowledge. Let us help you with any project large or small.

Areas Served

Spokane, Deer Park, Spokane Valley, Colville, Chewelah, Stevens County, Spokane County, Surrounding Areas.

Consumer Experience Rating

To earn the Showroom Diamond, the dealer must have a showroom with a minimum number of Milgard products on display.


1101 S Frontage Rd
Deer Park, WA 99006
United States



Monday8:00am - 5:00pm
Tuesday8:00am - 5:00pm
Wednesday8:00am - 5:00pm
Thursday8:00am - 5:00pm
Friday8:00am - 5:00pm


Free estimates
Has Showroom
Offers installation

G.S.I. Complete Glass Inc. Reviews

The information shown on this page is provided by your local Milgard Certified Dealer which is responsible for the content of and views expressed on this page. Milgard is not responsible for the accuracy of such content, and any views expressed do not necessarily represent the views of Milgard Windows & Doors.

For full dealer information and product availability, please contact your local Milgard Certified Dealer.

G.S.I. Complete Glass Inc. is rated 5.0 out of 5 by 2.
Rated 5 out of 5 by from Hands on customer service I have used GSI Glass for years for my windows (Milgard) , doors , shower doors that are amazing and auto as well GSI is my one stop shop before I go elsewhere. Family owned with real customer service not press 1 now I get a real human every time I call. Thanks again GSI I'll be back when and if in need. M
Date published: 2018-01-30
Rated 5 out of 5 by from Great service and best installation around! Great team, responsive and accurate. Matt got me set up with everything and great pricing on top of that!
Date published: 2018-01-25
  • y_2018, m_4, d_21, h_2
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.8
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_2
  • loc_en_US, sid_prod.POR32617_dealer, prod, sort_[SortEntry(order=FEATURED, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_milgard
  • bvseo_sdk, p_sdk, 3.2.1
  • CLOUD, getContent, 115.62ms