In early 2011, the existing Massachusetts GTUG was renamed as the Boston GTUG. This GTUG typically holds their meetings in Boston. This renaming was done to make room for a new Western Massachusetts GTUG. This new GTUG will be holding meetings outside of Boston in Western Massachusetts, thus the new GTUG's name.
Google Technology User Groups (GTUGs) are user groups for people who are interested in Google's developer technology; everything from the Android and App Engine platforms, to product APIs like the YouTube API and the Google Calendar API, to initiatives like OpenSocial.
For a full list of existing GTUG groups, please check: http://www.gtugs.org