Generally, businesses and other organisations registered for GST will:
include GST in the price they charge for their goods and services
claim credits for the GST included in the price of goods and services they buy for their business.
So, while GST is paid at each step in the supply chain, it flows through your business but is not borne by your business (unless you are making input-taxed supplies – see GST definitions). The tax is borne by the final consumer, who can't claim GST credits.