A mother accused of poisoning her four-year-old daughter with cancer drugs has pleaded guilty to grievous bodily harm.

The 22-year old woman, from Queensland's Gold Coast, gave her daughter chemotherapy medication between June 2012 and April this year.

The girl did not have cancer and the drugs made her seriously ill.

The mother appeared briefly in the Brisbane Magistrates Court this morning.

She will be sentenced on a date to be fixed.