The present invention in particular is directed to a gas-supply connection assembly, a method of connecting a gas supply line to a gas inlet port, and a gas cooking appliance. In particular, a gas-supply connection assembly for gas-tightly connecting a gas supply line (2) to a gas inlet port (3) of a gas consumer (1) is provided, in which the gas supply line (2) is inserted into the gas inlet port (3) and connected thereto in that a bulge section (7) effectuated at an outer circumference of the supply line (2) in the inserted condition by plastic deformation thereof gas-tightly engages in a form-fit locking manner into a given indentation (6) in an inner bushing (4) of the gas inlet port (3).