Gemline | 20,673 followers on LinkedIn. Founded in 1958, Gemline is an award-winning, design-centric supplier dedicated to supporting communities by providing high-quality branded products to the promotional products industry. Exemplified in our purpose statement 'We Promote Community,' Gemline prioritizes building connections in everything we do. We are both B Corp Certified and a State of Massachusetts Public Benefit Corporation, committed to making a positive impact locally and globally.