As simple as...
pip install gputils-apiof course, preferably from within a virtual environment.
import numpy as np
import gputils_api as g
a = np.eye(3)
g.write_array_to_gputils_binary_file(a, 'my_data.bt')import numpy as np
import gputils_api as g
x = g.read_array_from_gputils_binary_file('my_data.bt')