Every year since the formation of the GSMBA, it has held an Open Fours Charity day (involving in the order of 40 teams) to raise money for various good causes. The money raised has been as follows:
| Year | Charity | Raised | Competition winner |
| 2017 | Macmillan Nurses | £784 | Ross |
| 2016 | Cheltenham Eye Therapy Trust | £1,000 | Gloster Knights |
| 2015 | Pied Piper Appeal | £720 | Woolhope |
| 2014 | Multiple Sclerosis Therapy Unit | £900 | Woolhope |
| 2013 | Salvation Army Young Carers Trust | £500 £500 | East Hanningfield, Essex |
| 2012 | Glos. Multiple Sclerosis | £1,115 | East Hanningfield, Essex |
| 2011 | Winston’s Wish | £1,050 | Wotton Hall |
| 2010 | LINC (Leukaemia) | £1,000 | Westbury Blue Circle |
| 2009 | LINC (Leukaemia) | £1,100 | Warminster |
| 2008 | Glos. Wildlife Trust | £1,100 | Winterbourne |
| 2007 | County Air Ambulance | £1,000 | Redmarley & Bromesberrow |
| 2006 | Glos. Eye Therapy Trust | £1,000 | Wotton Hall |
| 2005 | Alzheimer Trust | £1,500 | Hardwicke |
| 2004 | Cotswold Care Hospice | £1,200 | Corse & Staunton |
| 2003 | James Hopkins Trust | £550 | Listers |
| 2002 | Pied Piper Appeal | £600 | Listers |
| 2001 | Air Ambulance | £473 | Corse & Staunton |
| 2000 | McMillan Nurses | £599 | Listers |
