Called InterComms, is it aimed at people working in PR, public affairs, advertising, media agencies, content, events, direct marketing and other associated professions.
According to its organisers, InterComms will provide a social and professional forum for raising LGBT issues, and will go further by proactively supporting member organisations.
It aims to consult members on best practice for covering LGBT issues in comms, and set "tangible objectives" to benefit the industry and LGBT workforce.
The group’s founder and chair is public affairs professional Ethan Spibey, who will speak at the launch event at Havas' offices in London’s Kings Cross on 11 May.
Other speakers include: Paul Frampton, group CEO, Havas Media Group UK and Ireland; Iain Anderson, executive chairman, Cicero Group; Gemma Atkinson, chief operating officer, Active International; and Daniel Thompson, connections partner at Havas Media Group and deputy chair of InterComms.
Spibey said: "I’m so proud to be leading this new LGBT network and I’m keen to ensure we shout about the immense contribution LGBT professionals make to our industry. There are clear business benefits to having a more diverse workforce and that is exactly the message we want to send with InterComms; LGBT individuals in the workplace should be supported, recognised and valued.
"The launch of this network marks a unique opportunity to set an industry standard in supporting LGBT employees, and I’m passionate that our network will do just that."
Paralympian and CEO of Diversity Role Models, Claire Harvey, is to deliver a keynote speech at the launch event.