noun
job magazine for manual laborers (1991-2009)
Proper noun referring to a specific magazine published by Recruit Inc. from 1991 to 2009. The name comes from 合点 (がてん, 'understanding'), implying a magazine that helps readers find suitable physical work.
ガテンは、かつてリクルートが発行していた肉体労働者向けの求人誌です。
Gaten was a job magazine for manual laborers once published by Recruit.
noun
physical work; blue-collar work; manual labor
By extension from the magazine name, ガテン系 (がてんけい) is commonly used to refer to physical or blue-collar work and workers. The standalone ガテン is less common but understood in context.
彼はガテン系の仕事を探している。
He is looking for a blue-collar job.
ガテン系の職種は体力が必要だ。
Physical work requires stamina.