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G&J service areas

G&J's Mailbox Address: PO Box 434​ Finksburg, MD 21048

​G&J proudly serves the Southern PA and Northern MD regions. We specialize in installing low-voltage security system products for residential and commercial spaces. Protect your home or business with our personalized security solutions - become a customer today! Listed below are the counties we serve in the Southern PA and Nothern MD regions. 

Southern PA Counties

  • Adams County 

  • Cumberland County

  • Dauphin County 

  • East Lancaster County

  • York County

Northern MD Counties

  • Anne Arundel

  • Baltimore County 

  • Carroll County 

  • Frederick County 

  • Harford County 

  • Howard County

  • Montgomery County

Map of G&J's service area

If you are interested in having any of these security system products installed in your home or business, please click the "Request a Free Estimate" button to submit your inquiry via email. G&J looks forward to assisting you!

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