As I understand it, Rocoline and Geoline are not compatible with each other, so you should choose one or the other but not both.
I suggest you return the Geoline to the shop for credit and get Rocoline instead.
The lack of Geoline mentions imply it has been discontinued.
I remember reading an article, which I now cannot find, that there was a dispute over the rights to Rocoline at the time the current owners bought Roco out of receivership. The new owners needed a track system so the result was 'Geoline'. The dispute was subsequently settled and Rocoline became available once more.
I use Rocoline with bedding on my Continental Shelf layout.
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