Bianca grows closer to Heath on Australian screens later this month when he warns that her younger sister April (Rhiannon Fish) has been self-medicating in a bid to deal with exam pressure.
Although the blonde's ex-boyfriend Liam Murphy (Axle Whitehead) wrongly suspects that Heath has been supplying April with the drugs, Bianca sees that the Summer Bay bad boy has done the right thing and gives him a 'thank you' kiss.
Gormley told TV Week of Heath's revelation: "Initially [Bianca] doesn't believe it, because April isn't that kind of girl. But then she realises that she's missed something big and her sister's in trouble."
"Bianca is so proud she's started seeing this good side of Heath and is disappointed that Liam's still judging him on face value, like she did initially," she continued. "She defends him because he did good.
"She's feeling that Heath's pretty hard done by, and in his world, the only way to show appreciation is to maybe give him a kiss. It's a thank you and, 'I have noticed you and I'm appreciating you'."
Gormley added that she is enjoying working closely with Dan Ewing, who plays Heath, on the storyline.
"Getting to work with Dan is fantastic," she said.
Home and Away airs these scenes next week on Network Seven in Australia and in the winter on Channel 5 in the UK.
> Home and Away April drugs plot is life-changing, says Rhiannon Fish
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