Commercial Locksmith Services Near You. GLC Locksmith Services is a local company here in Dallas, Garland and Mesquite area. We specialize in commercial locksmith work and able to secure and create easy and convenient lock and key system for large and small businesses. GLC Locksmith Services also can help with preparing your business for fire department inspection and make sure you meet the city code when it comes to locks. We help installing panic bars, create rekey systems and master keys systems for small and large businesses, install electronic and manual key pad locks for businesses with high traffic volume and more. Contact GLC Locksmith Services for all you commercial locksmith needs.