For the "KickScooter GT2P by Segway (70 km/h, 90 km, 1500 W)", there are no precise specifications in the sources provided that indicate a specific smartphone support compatible with this particular model.

However, Segway does offer a generic smartphone holder called the "Ninebot Phone Holder" which is designed to be compatible with most Segway scooter models. This holder is adaptable for different smartphone sizes and can be fitted to handlebars with a diameter of 20-22.2 mm, which could be compatible with the KickScooter GT2P.

It is advisable to check specific dimensions and compatibility with the manufacturer or seller to confirm that this mount will work correctly with your model of scooter.