FontObject has resolution attribute but it isn't in documentation (https://www.blender.org/api/blender_python_api_2_77a_release/bge.types.KX_FontObject.html)
Also, by doing
print(fontobject.resolution.__doc__)
... it prints:
float(x) -> floating point number Convert a string or number to a floating point number, if possible.
I think it is not even a description...