The Groton Dunstable Travel teams compete in the Central Mass Youth Basketball League (CMYBL). The League is an all-volunteer program and is administered by Josh Hammer (Div 1 and Div 1A) Daryl Rupp (Div 2). Each town organizes and schedules it's own program. The GDYBL Travel Board administers Groton Dunstable's participation in the CMYBL.

The league is divided into two divisions, as follows:

Division 2
  Athol
  Bolton
  Gardner
  Harvard
  Lancaster
  Littleton
  Lunenburg
  Orange
  Princeton
  Quabbin
  South Lancaster
  Stow
  Templeton
  Winchendon
  Westminster

The URL for the CMYBL Division II website is:https://ncmybl.com

Division 1 and Division 1A
  Acton/Boxboro
  Concord/Carlisle
  Fitchburg
  Groton/Dunstable 
  Hudson
  Leominster
  Marlboro
  Maynard
  North-Middlesex
  Oakmont  
  Shrewsbury
  Sudbury
  Wachusett

The URL for the CMYBL Division I  and Division IA website is: www.metrowestbball.com/launch.php?lg=cmybl