The range will consist of products numbered one to seven to mirror the stage at which they are used. For example, one is a shower gel, two shampoo, four shaving cream and seven hair wax.
The introduction of the range, expected in the next few weeks, comes just three months after the store's opening on London's Carnaby Street. Previously the store only sold third-party brands.
The range has been formulated in Paris by the doctor responsible for creating US department store Barney's own-label range.
Packaging was created by Pikefell, a design company founded by G.room founder Michel Pike.
G.room is looking to broaden its availability and is seeking distribution in mens' fashion stores.