Mount Floating Shelve

2 Floating Shelves to Mount . ( Gyprock Walls) I would like to arrange someone to mount a floating shelve in my home office in the garage on a Gyprock Wall, and also 1 x inside a bedroom. I havent purchased the shelf yet, but can easily do so within 1 day from Ikea or Bunnings, ( so if you have any expereince or recommend which ones are good, please let me know.)