Also, there are numerous homes for sale in the Gaithersburg area and your best bet is to search Google and find a house of worship in the area that fulfills your needs and is within a reasonable distance of your target property.
You can use any of my websites, including samhankinrealestate.com or Gaithersburghouses.net, to search for listings. If you need further assistance, please call me.
Here's a map that should show all synagogues that are close - http://goo.gl/maps/yNNCa
If you enter an address in Google Maps, you can then click "search nearby" and enter the term that you would like to search.
Hope that helps - good luck.