Crystal Palace Football Club, the Professional Players Federation and the Professional Cricket Association are among the bodies partnered with the campaign.
Other associations include Luton Town FC, Sutton United, Walsall FC and Oldham Athletic.
Using the hashtag #TakeBackControl2022, Gamstop, its campaign partners and supporters reached 2.6 million people on social media on 15 September.
Gamstop said that it was raising awareness of its services before this years World Cup in Qatar, which begins on 20 November.
“We are very grateful to all our partners who took part with us on social media to support the campaign, using the #TakeBackControl2022 hashtag,” said Fiona Palmer, CEO of Gamstop.
“By sharing information about GAMSTOP with their followers they have helped us to educate new audiences about self-exclusion and where people can get help if they need it.”
In July this year, Gamstop reached 300,000 total self-exclusions since its launch in 2018.