The ICON nextGEMS data I have uploaded you here has a spatial resolution of ~ 10km (0.11°) and a temporal resolution of 15min. This data is from the 4th nextGEMS cycle and is available for the years 2020-2050, for which the ssp370 scenario was used. The data is not global, it covers a region around Austria. The output is stored in healpix grids. Information on how to deal with the healpix data can be found at  https://easy.gems.dkrz.de/Processing/healpix/index.html

For selecting a specific grid cell according to its coordinates the nside needs to be known and if it is nested, for this data nside is 512 and nest = True.

For example the grid cell with the coordinates cell with the coordinates 48.2083°N 16.3731°E (Vienna) can be selected like this: 
cell_vienna=healpy.ang2pix(512, 16.3731, 48.2083, lonlat=True, nest=True)

You can also ask me if you have any further questions about the data.

Kerstin