The Logion 100 is the only logion in Gospel of Thomas where the term "god" is named. Only, he is the evil demiurge, not the Good Father of Jesus:
They showed Jesus a gold coin and said to him, "Caesar's agents are exacting taxes from us." He said to them, "Give unto Caesar the things that are Caesar's, give unto god the things that are god's, and give unto me that which is mine."
So the sense is: serve and adore the demiurge only apparently, but hate him in secret.