Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000912562-22-000007-index-headers.html | 2022-02-23 07:41:10 | |
| 0000912562-22-000007-index.html | 2022-02-23 07:41:10 | |
| 0000912562-22-000007.txt | 2022-02-23 07:41:10 | |
 0000912562-22-000007-xbrl.zip | 40197 | 2022-02-23 07:41:10 |
| exhibit991q42021earningsre.htm | 737074 | 2022-02-23 07:41:10 |
| FilingSummary.xml | 1703 | 2022-02-23 07:41:10 |
| Financial_Report.xlsx | 5717 | 2022-02-23 07:41:10 |
 gibraltar_wordmarkxbluexrgba.jpg | 147573 | 2022-02-23 07:41:10 |
| MetaLinks.json | 17485 | 2022-02-23 07:41:10 |
| R1.htm | 40178 | 2022-02-23 07:41:10 |
| report.css | 2767 | 2022-02-23 07:41:10 |
| rock-20220223.htm | 34830 | 2022-02-23 07:41:10 |
| rock-20220223.xsd | 2188 | 2022-02-23 07:41:10 |
| rock-20220223_htm.xml | 11013 | 2022-02-23 07:41:10 |
| rock-20220223_lab.xml | 25481 | 2022-02-23 07:41:10 |
| rock-20220223_pre.xml | 13214 | 2022-02-23 07:41:10 |
| Show.js | 1085 | 2022-02-23 07:41:10 |