Boise Cascade acquired Georgia-Pacific's Engineered Lumber business in March 2016.
Historic guides are available below for reference 
GP-Joist formerly Wood I Beam™ Joists Literature
Engineered Lumber Product Guide - Wood I Beam Joists - US
Wood I Beam Joists - Canadian Limit States Design - Canada
GP-LVL formerly GP-LAM® LVL Literature
Engineeered Lumber Product Guide - GP-LAM LVL - US English
GP LAM Laminated Veneer Lumber - Canadian Limit States Design - Canada
GP-Rim formerly FiberStrong® Rim Board Literature
Engineered Lumber Product Guide - FiberStrong® Rim Board
Engineered Lumber Quick Guide