1. In the field of architecture, GYZL usually refers to the constraint edge constructional column; In steel structure, this word can refer to external wall constructional column or special-shaped constructional column.
2. In the field of trademarks, the gzl 4 1- education and entertainment trademark was applied by the applicant Shenyang Gule Truth Education Information Consulting Co., Ltd. on 2021-06-1.
In addition, I personally think that GYZL may be the pinyin abbreviation for "more serious".