He is the Supreme Being who created all and filled it with MANITOU life force. He is therefore due a lot of respect. He also owns everything in the Universe, but seems happy enough to lend bits of it to humanity to play with.
In return for his benevolence, his Algonquin worshippers treat him with the utmost respect and make him ritual offerings of smoke.
Why smoke? Because GITCHE-MANITOU is extremely fond of tobacco. But he is not a Cigarette Smoking Deity. With amazing generosity, he gave his entire tobacco supply to humanity a long long time ago.
Having kicked the habit for the benefit of mankind, he remembers his worshippers fondly whenever they smoke a pipe in his direction.
According to one of our valued correspondents, the Sacred Pipe contains a herbal mix of red willow, bearberry and various other plants. The exact mixture is sacred and cannot be divulged.
All we know is that, when smoked in the proper manner, the sacred smoke carries the prayers of worshippers up to the Heavens where GITCHE-MANITOU resides. Most definitely not passive smoking.