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About GRT Avionics

We’ve been building electronic flight instrumentation since 1991 and pride ourselves on offering a full range of feature rich EFIS systems suitable for a variety of aircraft. Ultra-lights to twin engine Velocity V-Twin’s and even turbine powered aircraft – aircraft owners choose GRT Avionics because of accuracy and reliabiilty, our dedication to innovation and excellent tech support.

Contact Us

Hours
Monday—Friday, 9AM–5PM EDT

Tech Support is available from 10AM–12PM EDT and
2PM-4PM EDT

Phone
616-245-7700

Email
Sales: sales@grtavionics.com
Support: support@grtavionics.com

Address
3133 Madison Ave. SE
Wyoming, MI 49548

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We will be closed on Thursday November 27 and Friday November 28. Happy Thanksgiving! Dismiss