Commercial aviation uses mostly ILS and occassionally VOR or NDB based approaches so they don't need GPS approaches. In Europe, there may be a market on the fringes (e.g. Ryanair flying into some regional airport that doesn't have an NDB or VOR) but that's all it is.
The driver for commercial aviation to use GPS is the money they'd save in no longer having to maintain those ILS and beacon systems.
SSD