GST only applies for local sales. In your case, the custom imposed import tax on items you buy from oversea.

Depends on luck. How much were your items from US? I've been buying so many stuff from Amazon, Aliexpress, Taobao and iherbs. No tax or GST so far. Maybe value of my items all below RM500.00.

These days I purchase most items online, things can range from swimming trunks, dish rack, sewing kit, apple slicer, ice box, torch light, camera batteries....the list goes on. Why am I doing this? Price are definitely cheaper by a lot and so far quality is there.

Try to keep the value low, preferably below RM300.00.