Fact - GPS is approved as a primary means
IFR navigation aid for en-route, terminal and non-precision approach aid all over the world (which actaully extends beyond the continental boundaries of Europe

)
Fact - GPS will
never be approved as a primary means
VFR navigation aid, but is another useful supplementary aid (as are NDBs,VORs, DMEs etc ....
A hand-held type GPS and an IFR approved receiver are very different animals.
In general, GPS jamming is a bigger problem in Europe than elsewhere due to the overcrowded frequency spectrums - GPS can be affected by harmonics.
The ground navigation aid infrastructure and radar coverage in Europe means that GPS is not as operationally important as in other parts of the blue marble...