The project will address gaps in existing treatments and research the extension of services to unrepresented groups.
GambleAware are seeking applications from organisations to fund residential rehabilitation for people with gambling issues, including compounding factors such as alcohol or substance use issues, over a period of three years.
The charity claims that there are issues in existing treatment programmes, particularly the lack of attention to mental health problems. It said that its annual statistics, along with its gap analysis both showed evidence of this room for improvement.
Potential tenders must demonstrate experience in the treatment of gambling harm and its co-occurring health needs.
GambleAware will hold an engagement events on 18 June for prospective bidders. The closing date for tender submissions is 16 July.
Last month, GambleAware launched a line of interactive maps to identify areas of Great Britain that have high numbers of those seeking gambling treatments and may have insufficient treatment services, in a bid to track rates of demand.
Also last month, a study backed by GambleAware revealed that online gambling harm surveys were at a risk of selection bias, which could wrongfully increase the numbers of those experiencing gambling harm.