Too close to the gully which should be sealed at least, even tho it has a water seal so there is no way that any lpg gas could collect in the drainage system. Different story if it was a storm water drain.
Ha nice that they left just enough room next to the gully to position the bottles.....

Just a couple of days ago I drove past a building (main road) and saw a 9kg bottle connected to a external gas water heater  sitting on top of a blue plastic barrel to reach the pig tail, no restraint chain.
And another i noticed on a 2end story roof lean to, must have had to reach out the upstairs window to change the bottle.. i must try to get a photograph.