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I would suggest: 'There is nothing else than the house of God and the gate of Heaven in here'.

or 'There is nothing here if not the house of God and the gate of Heaven'

I follow the official translation.

http://bible.cc/genesis/28-17.htm

I'm sorry, Serena. I have regarded "hic" as an adverb here - without any context it was difficult to judge what it was indeed... I just felt that the adverb would fit better a church entrance... According to the official translation it was taken as a pronoun "hic, heac, hoc". I can see both the translations are possible.

I also know it is quite ambiguous...