Deep learning using GPU of Odroid XU4

[good-days]

i executed this source code using Odroid XU4 with Unbuntu, Keras, Theano.
I success executing this code on CPU of Odroid XU4 but want to executing that on GPU of Odroid XU4.
So I attempted that but failed
My Questions are below that...

1. Did you attempt using the GPU of Odroid XU4 when executing this code?
2. if you used GPU of Odroid XU4, Can you notified me how using the that