How do i contact gilman? Gilman Corporation has specialized in its extrusion and fabrication into a variety of unique, reliable, super-tough products. Call, write, fax, or email us for immediate answers to your questions. Gilman Corporation, Box 68, Gilman CT 06336 Telephone: 800.622.3626 Fax: 860.886.5402Are the gillman companies still in business? Now run by Frank's granddaughter Stacey Gillman, under her leadership, the Gillman Companies have grown to become one of the largest retail automotive groups in America. And today, the third Gillman generation is active in the business.Why choose team gillman auto group? The Team Gillman Auto Group in Houston, TX, knows that you have high expectations. As one of the most popular local, family-owned automotive dealership groups in the area, we enjoy the challenge of meeting and exceeding those expectations.Who is gilman partners? Gilman Partners is the leading retained executive search firm and talent advisory in the Midwest serving clients from our headquarters in Cincinnati.