The core activity of GMT Publishing is the creation and dissemination of media content in the fields of Swiss watchmaking (Horlogerie) and sailing (Nautisme). This includes the publication of magazines (e.g. GMT Magazine, WorldTempus, Skippers Magazine), the management of online platforms (e.g. websites, YouTube channels, Instagram accounts), the organization of events (e.g. Geneva Watch Tour) and the publication of books (e.g. Millennium Watch Book). The company positions itself as an independent media partner for the watch and sailing industries, offering its customers a platform to present their stories and products to an international audience.